I bought a refurbished scooba for about $150. I know I know, it's not as environmentally friendly as me actually cleaning my own home, but i just don't bother to, and if you think about it i'm probably keeping a potential pandemic at bay with this thing. Plus it leaves me more time to read this nonsense you post.
I don't want to argue about the electricity it uses, nor any other "you wasted your money" stuff, i just wanted to say that i love it. It uses fuzzy-logic, and i find myself watching how it works. I'm not sure how it figures out the patterns, but i will say that it does a very very good job at cleaning the rooms i put it in, it sort of spirals out and remembers places it needs to come back and do a little bit more.
sorry for any drama, i just like this new toy of mine, and wanted to give it five pickles for being programmed well and designed well:
here is a kitten on one (not my scooba, not my kitten) just for cute factor for anybody who doesn't know what one is.