Ok, I'll admit that it is great not having to worry about scooping, and once I empty the tray, the house no longer smells like cat poop, BUT:The thing jams constantly. When ever I hear it raking, i know i'm going to have to get up to shake the litter so the rake can return to its resting position. If not it will cycle constantly. This usually happens at night, or an hour before I have to wake up.Clumps stick to the bottom. I use Tidy Cats, and it still clumps. Actually, the best brand was the walmart generic. It only clumps once a week.If you have more than one cat get the larger size, otherwise you'll be sorry. Very sorry.