"I have a very "busy" kitty who likes to make a big mess in her litter box (she is almost 5 months old) by pawing the litter for a long time and often, even just for play (perhaps practice). I wanted a litterbox where she can turn around comfortably enough to keep the pawing inside the box... this littter box is certainly perfect for that. It is also light inside (the lid is thin and light and allows light to come through) so that I can see what my kitty is upto. It is also very easy to clean since nothing seems to stick to the sides or the bottom (I am using crystals with clumping litter and mix it).
Cons: I have never been able to properly close the lid, so if I have to lift the litterbox, I need to lift from below. But since such lifting happens seldom (only for cleaning the entire litter box out), it is not much of a problem. Still, I removed one star for the non-functioning lid locks."