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.
It's an interesting idea but it just didn't work for me and I wouldn't consider buying another.