I really like this automatic litter box. It was easy to put together, lighter than other automatic boxes Ive had, and works more consistently than some more expensive brands. The cats seemed comfortable in using it and used it soon after I had assembled it. Two things that keep it from 5 stars are one, I always manage to knock off the side panel when accessing the waste bin. Two, the used litter seems to stick to the side and sifting panel more than it does with other boxes. Otherwise, Im pleased with my purchase.