Any one I have ever known to use one of these things ended up going right
back to a regular litter box in no more than sux months. The resiviour for
waste is not very big. When a cat has diareah its nearly imposible to get it
out of the teeth on this thing and so it smells, alot.

I think that it's great! I have had mine for about 5 months and haven't had
any problems with it. Sure its an investment but it has definitely paid for
itself. No scooping and no more buying litter has made my life much simpler.
I have no complaints when it comes to performance. Next month I am going to
have to give it a thorough cleaning, the guide recommends you clean it out
every 6 months to ensure it stays in working order. I would rather clean it
out every 6 months than scoop litter every single day.