Sleep Number

c4 Smart Bed

Sleep Number c4 Smart Bed

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Overall

#118 in

Mattress

according to Reddit Icon Reddit

Sentiment score75% positive
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Top Pros

Top Cons

Last updated: Jun 28, 2026

Reddit Reviews

Reddit Icongettinchickiewitit
8 months ago

We went through this a while back. We went to the mattress store and found what seemed like a good inner spring mattress. We did not like it and ended up sending it back within a month. Then we ordered a soft foam mattress. It was ok for a while, but ended up being too soft and hurting my back. We finally decided to order a Sleep Number bed, and gave the too soft mattress to our daughter. The Sleep Number has been great. You are not locked into any level of firmness or softness because you can adjust it. It has a feature that adjusts the firmness automatically when you roll to your side. We got one of the cheaper Sleep Numbers (I believe it is the C4 series). It is not one that you can raise the head and feet, and does not have any crazy features like temperature control or anything. You do have to buy the integrated box springs with it because the air pumps sit in the base. They can be a bit pricey, so watch for a sale (they have them often.) It looks like right at this second you could get the C4 Queen and base for about $2000.

Reddit Iconjohnboy2978
7 months ago

I think about $1500 but that was about 15 years ago. It's a king size dual control select comfort bed with 3 different zones that you can adjust individually. Since the zones are air bags, feels just as good today as it did new. Worth the price.

Reddit Icongreenzetsa
9 months ago

I came here to say get a Sleepnumber! I got one with my ex for the same reason, and when we broke up I kept the mattress and bed. My current boyfriend could probably fall asleep anywhere and on anything, but it was a nice luxury to be able to set the mattress for him to his liking. The most basic mattress they have is great and very affordable IMO.

Reddit Iconwhatdoido8383
4 months ago

Same. We purchased one last year and it's been a game changer. People scoff at their price, and yes they are expensive. $6K+ for a bed seems crazy until you experience good rest. We have a split top and it can auto raise if one of us starts to snore or whatever, and it really does work. I sleep better on a firm bed and my wife sleeps better on a soft bed. We each have our side adjusted how we like it. We went through 3 of the other name brand foam beds over the last 5 years trying to find one we liked. We could just never get comfortable.

Reddit Iconbi_geek_guy
4 months ago

I’m not a Sleep Number shill, I promise. I bought one eighteen months ago with an adjustable frame and I’ve never slept better. I wake in the same position that I fell asleep in with no pressure point aches or pain and head up so no more GERD wake ups. They are not cheap, but I got what I paid for.

Reddit IconDirectAccountant3253
7 months ago

Sleep number king size with adjustable base. About $7,500. Absolutely best frivolous purchase we've made. Love it.

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Rankings by Use Case

Best for Ease of movement & sex

Novaform - Platinum 16.5" Luxury Hybrid Mattress

Ranked #1

Novaform - Platinum 16.5" Luxury Hybrid Mattress

Individuals who toss and turn frequently, or couples who prioritize a mattress that is responsive and bouncy for sexual activity, and dislike the "sinking" feeling of memory foam.
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Best for Heavy & plus-size sleepers

Brooklyn Bedding - Titan Plus Luxe

Ranked #1

Brooklyn Bedding - Titan Plus Luxe

Individuals with higher body weights (typically 230 lbs or more) who find that standard mattresses quickly sag, lose support, and cause back or joint pain.
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Best for Hot sleepers

Purple - The Purple Mattress

Ranked #1

Purple - The Purple Mattress

Individuals who consistently wake up feeling hot or sweaty, and find that their mattress absorbs and retains body heat throughout the night.
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Best for Long-term durability

Sleep EZ - Organic Latex Mattress

Ranked #1

Sleep EZ - Organic Latex Mattress

Buyers who view a mattress as a long-term investment and want to purchase one that will maintain its support and comfort for over a decade, prioritizing total cost of ownership over a low initial price.
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Best for Motion isolation for couples

Helix - Midnight Luxe

Ranked #1

Helix - Midnight Luxe

Couples or co-sleepers who are easily woken up by a partner's tossing, turning, or getting in and out of bed.
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Best for Natural & organic materials

Sleep EZ - Organic Latex Mattress

Ranked #1

Sleep EZ - Organic Latex Mattress

Health-conscious individuals or those with chemical sensitivities who want to avoid synthetic foams, chemical off-gassing, and potentially hazardous materials like fiberglass in their sleep environment.
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