alt Hacker NewsI used to have a similar dumb one (Roomba 860 if memory serves) and it would take the same path over and over again in certain corners of my house, which meant my carpet ended up with unsightly wheel tracks on it from the repetition. I don't think it did a very good job vacuuming either, no matter how much it ran, a normal vacuum would always pull a boatload more crud up.
It's an interesting idea but it just didn't work for me and I wouldn't consider buying another.
It's not for hardcore use for sure, not a replacement for a proper vacuuming. I use it in my office/part of my basement, it gets the vast majority of stuff up and keeps the cat hair under control.
I don't know that I'd buy another, especially because the new ones creep me out with all the cameras and such, but as long as I can keep this one running, it does a good enough job.