[woriuweflksdncn]

The simplest machine that will clean your living room? That'd be the 675. It's currently $219.99 on their website--it can easily clean one room.

But you also mention having them "all over [your] house." In that case, I'd recommend the i7 or s9. I've got the i7 and I think it's fantastic.

There are a few factors to consider, but it's not complicated. Do you have mostly carpet or hard flooring? Any kids or pets? Do you want it to clean the whole house or just one room?

[wenc]

Second the 675. Best Buy had it in-store for $199 so I got one before my state's stay-at-home order and love it.

It's not the smartest Roomba ever (it bumps around a lot to learn its environment--I don't think its sensor suite is that advanced) but it does the job just fine. I just let it run while I'm working.

There's a psychological benefit to having clean floors, especially when one is home a lot these days.

[kapilvt]

also do you want to clean with the lights out, in regular patterns... in which case botvac is worth a gander (lidar, square face [corners]). I dig irobot backend (camera recog) but eod consumer tech has one judge, does it work? and under what conditions.

ps. newer models of irobot are exploring the lidar space

pss. military applications are under a different irobot spin out/brand.

[woriuweflksdncn]

Yes, cleaning with/without lights is another consideration, but an easy one to overcome no matter your preference. I went all in and have smart lighting that comes on when the Roomba runs at night, but it doesn't need much light, and the same thing could be accomplished with a cheap Hue bulb or even a "dumb" timer.