I did a search to see what other people had to say about these. I wish I had never gotten one! I got the Performa Plus b/c it's more attractive than the Littermaid and it was slightly more expensive which (wrongly) led me to believe it was better.
It has NEVER swept on it's own. It only sweeps when I turn it off and back on. Looser stools get stuck on the rake, and the rake doesn't go to the bottom, which leaves a layer of ew down there. The replacement plastic liners are over $5 a piece and you really need a new one everytime you clean. So it's over $20 +tax (and shipping for me) just for the liners. That's assuming you only clean once a week. The plastic baggies that hold the stuff last about 2-3 days. You get a pack of 4 for about $4.
I'm going to try to return it to the store, or send it to the company under warranty and get my money back. The frame has never fit properly either.
It's a piece of junk.
I agree w/the poster who said it shouldn't even be on the market.
I looked at the Litter Robot, but I don't think my cat would get up in it and even if he could, it's be hard for him. I think I'm just going to get a normal box... maybe a sifting kind. I want to keep it clean as much as possible, so I don't want a hooded one b/c I won't be able to see if there's anything I need to scoop/sift out.
I wish I'd have read reviews before I got it!