woah, that is so totally cool. Expensive -- more than a month's rent and utilities combined, but seriously cool.
Also, they sell them in my country -- even in my city, and the webpage says they have a promotion thing where you can borrow it for a night and then take it back the next day for free -- under the idea that a person would be sold on the idea and wouldnt want to go back to their old vacuum cleaner. So, basically, I could get my carpet cleaned for free, and then give it back. If the thing would clean it thoroughly (and I'd be willing to babysit it for a night if it needed to be emptied frequently), it's possible that it could get enough of the ingrained dirt out that i could make reasonable progress with regular vacuuming.
I like that idea. Yes you could do it in a night. It'll seem frustrating if you watch it (because it ha a random walk algorithm)- so don't. Just let it do its thing and empty it every so often. It will clean your floor so thoroughly that you'll be surprised.
An exercise:
Name something that you do not do but should/wish you did/are told you ought, or that you do less than is normally recommended. (For instance, "exercise" or "eat vegetables".)
Make an exhaustive list of your sufficient conditions for avoiding this thing. (If you suspect that your list may be non-exhaustive, mention that in your comment.)
Precommit that: If someone comes up with a way to do the thing which doesn't have any of your listed problems, you will at least try it. It counts if you come up with this response yourself upon making your list.
(Based on: Is That Your True Rejection?)
Edit to add: Kindly stick to the spirit of the exercise; if you have no advice in line with the exercise, this is not the place to offer it. Do not drift into confrontational or abusive demands that people adjust their restrictions to suit your cached suggestion, and do not offer unsolicited other-optimizing.
To alleviate crowding, Armok_GoB has created a second thread for this challenge.