This self cleaning litter box is pretty neat! You put the litter in the bottom and can set it to clean the box either on a schedule or for a certain duration after the cat uses the box. It rotates backwards sifting the litter and then the clumps get dumped into a bin. It then rotates forward and backward leveling the litter. The box is labeled as XL but for my 16lb. chonk, it feels pretty small. The box also measures the weight and can notify you through the app when your cat uses the box. The box that the clumps are collected into is pretty small and requires liners unless you want to continually have to clean it. It comes with a floor mat, extra liners, and three deodorizers.