Yikes! Actually, I really don't mind the two minutes a day I spend scooping litter boxes--certainly not to the point I'd spend that much on a robopotty!
****a reminder, if you haven't been seeing very many hummingbirds, don't forget to fill your feeders anyway. The little guys are getting ready to head South, and need it. I have seen very few this year, until suddenly, I have at least 10 fighting over my six feeders. It's very entertaining!