First off: We love Roomba. I bought 2 for Cameron for Christmas (I found a good deal). And he fell in love -- as did River. One of them gave us problems, so the company, IRobot sent a replacement. So, then we had 3 Roombas (though one doesn't work the way it should). Then the other week I found another Roomba at a yardsale. It still had the original packaging, and looked like it was in great condition. The owner said it had a faulty battery, so I offered her $35 for it and came home with another Roomba. Luckily, we happened to have an extra battery, and TADA! We now have 3 working Roombas (and one faulty Roomba). River treats the Roombas like pets (he often drops food on the floor and when we scold him he says Roomba is hungry).
So, we're believers. We run them daily. And it's fun. And our house is clean.
The end.

The remote is fun to play with, too.