Dreame - L40S Ultra
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Reddit Reviews:
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Last updated: Jan 5, 2026 Scoring
Liked most:
80
15
"The AceClean dryboard (its mop pad cleaning tray) on these models is currently the best self cleaning mop tray that can clean its mops as the only maintenance required is to occasionally clean a removable palm-sized drainage filter and wipe down the flat dryboard (no nooks and crannies for dirt to hide)."
"mopping is BETTER than i do."
"I find that with daily vacuuming first to remove any debris that could scratch the floor, then making it mop (using the vacuum first before mopping setting so the spinning mops won't drag any debris which will scratch your floors), made my wood floor have a nice sheen and noticeably felt softer, and the tiles were always barefoot friendly."
261
83
"I have 3 parrots so the floor ALWAYS has something on it. Bird poo, food, small chunks of wood, doesn't matter robots got it covered."
"I’ve seen on the camera the poor guy making multiple trips to self empty while in one room but it’s cut the hair buildup tenfold."
"With three they can just make it to a full week for emptying. ... Life changing."
155
6
"The AceClean dryboard (its mop pad cleaning tray) on these models is currently the best self cleaning mop tray that can clean its mops as the only maintenance required is to occasionally clean a removable palm-sized drainage filter and wipe down the flat dryboard (no nooks and crannies for dirt to hide)."
"I would WAY rather take the vacuum back to the dock once every few weeks than vacuum all the time. ... I am more than happy to pay $150/year to eliminate 99% of my vacuuming. I would happily pay double that."
"the new dreame robots (L40S ultra, L40S pro Ultra, and the X50 Ultra) in Australia cleans its own filter when it autoempties."
29
10
"It also doesn’t bump into stuff, slows down and turns around before running into anything. I am impressed. ... The navigation is night and day between this and J9+, no more bumping or getting lost. ... I think it’s better, it has the front facing camera which looks to be higher resolution, plus the LiDAR does make a huge difference to the speed of navigation, plus it doesn’t bump into furniture or doors anymore."
"My LDS-only Xiaomi would always get tricked by a floor to ceiling mirror and think there’s a magical place beyond it due to the limitations of LDS. ... My Dreame L40S Pro Ultra (same 110° LDS sensor but with an RGB camera and fill light) was able to accurately tell that the mirror was actually a mirror wall and after cleaning that room, correctly identify it as a wall (the LDS and the RGB camera would fight while it’s cleaning the room over whether or not it’s a wall or a magical portal but it wised up when it finished cleaning that room)."
"The dreame L40S Pro Ultra has much better obstacle avoidance and object detection for smarter cleaning features like stain detection and large particle detection where it’ll slowly mop only or slowly vacuum only and not use the side brush so it won’t be kicked away."
4
1
"The AceClean dryboard (its mop pad cleaning tray) on these models is currently the best self cleaning mop tray that can clean its mops as the only maintenance required is to occasionally clean a removable palm-sized drainage filter and wipe down the flat dryboard (no nooks and crannies for dirt to hide)."
"the new dreame robots (L40S ultra, L40S pro Ultra, and the X50 Ultra) in Australia cleans its own filter when it autoempties."
"and is really low maintenance (the autoemptying cleans the filter and the mop washboard is the lowest maintenance so far)."
Disliked most:
30
123
"It's just very bad performance when it comes to vacuuming. ... This has been the same performance since day 1 with original brush also. ... It seems the suction is not as close to the floor as it should be. ... My budget eufy L60 can pick up this debris with no issue on deeper carpet. ... This is the most basic requirement of any vacuum."
"The bigger issue is that the paths are not as tight and overlapping. ... When I look at the cleaning paths with the MOVA On the tightest setting with the max number of passes (x3) It has nowhere near the coverage of the qrevos and the carpet is not clean. ... The Revos get really tight around legs while the MOVA barely tries to approach. ... Both my Qrevos are much quieter than the p10 ultra and actually leave the carpets looking clean."
"Hair Pickup on carpet is better than the S7 MaxV but still worse than the Neato D7. ... I confirmed this by running the S7 Max V first (with rubber brush), on my upstairs carpeted room - that I purposely haven't vacuumed in a week. S7 Max V barely got anything and had some wrapped around the edges - as it does. ... For me yes but I say that mostly because of the tangle free vacuuming of pet hair and the improved hair pickup on carpets. I was tired of cleaning out the old one and so far with this I have zero tangles. ... The S7 MaxV had the worst hair pickup on carpets, with the stock rubber brush, of all the bots I ever owned. Tangles were minimal but it didn't do well taking hair off the carpets (it did great on the hardwood/tile though). Swapping out the rubber to the bristle brush improved the pickup but increased the tangle problem - it also created a problem with auto-empty for me a few times. ... It mops/vacuums significantly better than my S7 MaxV. Especially on carpets (especially especially pulling dog hair off carpets). ... That being said I LOVE the anti-tangle brush. 3 Months and I haven't had to clean the brush one time. It's literally perfect for me."
24
33
"horrifically expensive"
"I tested Oura and returned it for this reason."
"price of replacement parts is a huge reason i recommend sebo vacuums. ... every time i have to look up a part for a miele vacuum i already know it ’s going to cost 3x-4x what it should."
4
4
"immediately after using it the spindles were badly wrapped in dog hair (golden retriever, 2 cats)"
"In my use, squeegee based self-cleaning mop pad cleaning trays will mean fur catches on the wipers and the nubs which happens with most friction based cleaning methods."
"In my use, squeegee based self-cleaning mop pad cleaning trays will mean fur catches on the wipers and the nubs which happens with most friction based cleaning methods."
0
3
"mop pads started failing to install and I was never able to resolve."
"In my use, squeegee based self-cleaning mop pad cleaning trays will mean fur catches on the wipers and the nubs which happens with most friction based cleaning methods."
"Unfortunately, the mop pad cleaning tray isn’t completely removable (the base in contact with the water is not removable)."
4
3
"will clean just as well if there are no thresholds up to 2.4cm."
"the Robot couldn’t get over the top of a bullnose wooden step which is “1” high"
"lacks the ProLeap threshold crossing system (fine for homes with no thresholds or thresholds up to 24mm)"
I also got the l40 ultra AE, but in op’s situation, the L40s ultra is a much better option
r/RobotVacuums • Looking for best option under $550 ->Just bought a Dreame L40S Ultra and a L40s Ultra AE, one for each floor of my house. So far they blow every roomba product ive had completely out of the water, However I like the AE more. The Regular Ultra (Non AE) is very finicky, its tried to eat every cord in my entire upstairs more than once and finds cords I didn't even know I had, its consider louder than the AE and the fact that it leaves its mop pads at the base is unreliable it sometimes "forgets" one or both then just throws a tantrum and shuts down, and it refusesto go under chairs or small tables that should be fairly navigable. The AE is a tank, it seems to have far superior navigation and object recognition, and the mopping is much more reliable. I did tons of research on Vacuum wars website and YouTube page and caught them on Black Friday at less than half price each.
r/RobotVacuums • What robot vacuum/mop is the best? ->Just bought a Dreame L40S Ultra and a L40s Ultra AE, one for each floor of my house. So far they blow every roomba product ive had completely out of the water, However I like the AE more. The Regular Ultra (Non AE) is very finicky, its tried to eat every cord in my entire upstairs more than once and finds cords I didn't even know I had, its consider louder than the AE and the fact that it leaves its mop pads at the base is unreliable it sometimes "forgets" one or both then just throws a tantrum and shuts down, and it refusesto go under chairs or small tables that should be fairly navigable. The AE is a tank, it seems to have far superior navigation and object recognition, and the mopping is much more reliable. I did tons of research on Vacuum wars website and YouTube page and caught them on Black Friday at less than half price each.
r/RobotVacuums • What robot vacuum/mop is the best? ->I recently got a Dreame L40 and really like it. It can leave the mop pads at the dock, which is a really useful feature if you have indoor cats. You can set it to vacuum first, then return to the dock to pick up the mop pads so it's not dragging them all over with bits of litter stuck to the pads.
r/RobotVacuums • Choosing a robovac for a housewarming present. Any suggestions? ->The Eufy with roller mops (S1, E25, E28) are generally regarded as the best for hard floors. If you're on a budget, the Dreame L40 is the best bang for the buck right now. It comes with a rubber roller that isn't great for hair but you can upgrade the optional tricut roller that cuts the hairs. I bought one on eBay from their official store on sale for Memorial Day for $500 with free shipping. Supposedly you can call their physical store in California for an even better deal and they will ship.
r/RobotVacuums • recommendation for a person w long hair and a dog that sheds like crazy ->I had a cheap one years ago, and despite the low price, it was a waste of money. I recently purchased a Dreame L40 and it cost a lot more than I wanted to spend - but it was actually worth every cent. It cleans my floors better than I can myself
r/smarthome • Will I regret buying robovac, just another overpriced toy? ->It is awesome!! ours arrived earlier than expected and has exceeded all my expectations!
r/RobotVacuums • Why is buying a robot vacuum worse than choosing a mattress? ->We got the Dreame L40s Ultra Pro - the Australian version - and it rocks! I can say I walked into my living space this morning to fresh, clean, streak free floors! and at a much cheaper price than we originally thought we were going to have to spend :-D In Australia it is still 1k, but i think it's earning it's keep already and the app is really good too.
r/RobotVacuums • Why is buying a robot vacuum worse than choosing a mattress? ->Vslam is pretty outdated i hated how mine just ran into everything, scratching appliances. I upgraded to the dreame L40. the navigation is so much better, but i am returning it and switching to roborock
r/RobotVacuums • Roomba j7 soured me on robot vacuums. Is it time to try again? ->I found the obstacle avoidance on the Qrevo series to be pretty disappointing. Switched to Dreame L40 and have been very happy. They almost never grab a cord.
r/homeassistant • What are the best robot vacuums right now ->Hello Amandainpdx! I’m deciding between: 1) Dreame L40 And 2) 3i P10 Ultra I would go with your recommendation for the Dreame, but it’s not Prime shipping. And I have 2 dogs, and not sure what they will think of it. With the 3i P10 Ultra being Prime with free returns, so you think this makes better sense? Thanks in advance!
r/RobotVacuums • Prime Day last chance- a few hours left to score PD deals. Are you on the fence? Let's cut through it. ->Pleased you are amused. What is the point in telling people bull shit. I've had an L20, L40, X40. The only one with no issues was the L20 and is still going strong. The L40 and X40 were replaced twice. I've had problems with Samsung . . I'm currently running a roborock, useless with obstacle avoidance, excellent on carpet, and a Eufy E28, very good but a very basic app. It isn't just about Dreame it's about giving no bull shit honest opinions
r/RobotVacuums • Dreame L50 Ultra Durability ->Yeah, my observations are identical. We recently started looking at robot vacuums, after we returned our Eufy X10 Pro Omni, and it seemed as if every single model has issues, yes, plural :D We ended up getting the Dreame L40s Pro Ultra and albeit it's doing a pretty good job, it suffers from the issue where it randomly drops its mop pads and I have to re-attach them manually. We worked around this by having the robot not leave them at the station while vacuuming. Oh well.
r/RobotVacuums • Roborock Saros 10R: very poor first impression + what's up with the general state of the robot vacuum market? ->I had the X10 Pro Omni and it was great, but it’s software went downhill after a certain version and the robot became pretty much unusable. I ended up swapping it for a Dreame L40s Pro Ultra and never looked back. Granted, the Dreame was €200 more, but it’s money well spent.
r/RobotVacuums • For the love of God, is there objectively a good robovac choice? ->Our L40s Pro Ultra suffers from the "mop pads random detachment issue". Otherwise, it's a pretty solid choice. Do your research before getting it, though, as you may have to deal with returns / replacements. Contrary to what most people are saying, dealing with Dreame's support has been great - fast and adequate responses.
r/RobotVacuums • Every Prime Day Robovac and Recommendations ->Yup, I feel you. L40s Pro Ultra is a great value for money and the mop pads issue is the only one I’ve encountered so far.
r/RobotVacuums • Every Prime Day Robovac and Recommendations ->https://preview.redd.it/4j6v2r2fwobf1.jpeg?width=1290&format=pjpg&auto=webp&s=90ddd22004c63de163edef0a17211a5aa7fd7397 I’ll let you be the judge😄Currently chatting with Dreame to have it replaced.
r/RobotVacuums • Every Prime Day Robovac and Recommendations ->If you don’t care about possible returns / exchanges, go for it. I just find it super annoying to have to send back both the robot and the station, even if only one of them is problematic, but oh well…
r/RobotVacuums • Every Prime Day Robovac and Recommendations ->We got a Dreame L40s Pro Ultra for 749 EUR and it's been awesome. I was also looking at the Mova V50 (Pro / Ultra / Whatever), but it was about 200 EUR more, so I decided against it. Roborock Saros 10r also seems to get good reviews, but it too is on the more expensive side. P.S. We used to have the Eufy X10 Pro Omni, but their firmware turned out to be complete garbage and we returned it for a full refund.
r/RobotVacuums • Anything better than Eufy E25 for my needs ($800 USD budget)? ->If you are willing to spend, get the Mova V50 Pro Ultra Complete. If not - the Dreame L40s Pro Ultra (brilliant value for money, got ours for about €750).
r/RobotVacuums • Need Real Feedback Before I Drop $$$ – Roborock, Dreame, Ecovacs, Eufy… (or Others) - Help Me Decide ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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