960

I’ve had Roombas since ~2016, a 960 and an i7+. While I wish they integrated with HomeAssistant a little better, they have been rock solid, especially the i7+ due to the self emptying. Currently the i7 runs daily on the main floor and the 960 runs in my bedroom(when I remember to empty it). Had to replace some parts on the i7 and they were mostly easily acquirable directly from iRobot, so that has been nice. Do a little bit of network monitoring and they don’t really ever seem to randomly phone home, so that’s nice.

I have a 960 with a dog that sheds, and the wheels and rollers will sometimes jam. Have had it for 4 years and still runs, but will require extraction of dog hair from time to time. Also, it's a little noisey but powerful.

iRobot Roomba 960 here, going strong after 6 years. Regular filter and brush maintenance seems to be key

Roomba 960 and it still works great too. We've had to replace the battery once and the "tires" a couple times, that's about it. With the new OEM battery, it actually runs ~2 hours on a charge. Now we get to see if they remain fully functional after the dust settles. I think the 600 to 900 series should be mostly OK, aside from not having post-cleaning reports and having to manually press the start button if the servers go down. The newer ones might be totally bricked, on the other hand, without connectivity.

My rumba 960 is great. Have had for ten plus years