Bests & Worsts Reviews from Amazon

This litter box has been in use 3 weeks, and the walls are terribly and deeply scratched already by my cat. This means it will be even harder to clean (sanitize) when changing litter. Also, clumps of urine/litter stick very well to the wall and bottom. Too well! They are not easy to remove, and I have to dig at them with the litter scoop. More scratches from that too. In my opinion, there is nothing good about this litter box. And how do you send a used litter box back to Amazon? Yuck.