It works but I wish the top door came off. Our cat didn't understand how to get in and out till we removed the top door (literally had to break it off). After several months of use, it's become hard to slide the bottom in and out for cleaning. Again we had to remove a piece. The plastic piece that captures litter had to go so we could open and close the bottom tray. Also our cat would fling so much litter into it, it was annoying to clean.