First time poster, and it's on a negative! But I wanted to say my piece and maybe save someone the trouble I had...
I adopted my kitty, Kiera, in Feburary from a shelter, and since this was my first time with any kind of pet that isn't confined to a box of water, and I'm a really clean person, I was all worried about how having a litterbox would affect my cleanliness requirements. So I bought the Littermaid (regular size).
My kitten had no problem using it, and seemed interested when ti went off. However, after no more than a month or so, it broke! I was not home at the time, and a friend of mine was coming to feed Kiera for me, and she heard the noise going - it was stuck and kept going for god knows how long! The "rake" eventually just broke off. I figured maybe it was just a bad model, and went to exchange it for a new one. Petsmart took it back no problem.
But the second one lasted no more than a week or two! The rake keept going off the track. I finally got fed up and do the old-fashioned scooping. Thankfully, Kiera is a very clean kitty, and I haven't had any kinds of problems, not even shedding!
She is a gorgeous grey-tabby, you can see a few of my pictures on my old webpage (the re-design is not up-to-date on photos yet)
http://www.violina23.com/old/photos/kie ... /main.html