I am not a cat person but when my little girl said all she wanted was a kitty for Christmas I gave in. I really hate cat litter smells and dealing with cat liter so this seamed like an ideal solution. (we live in rural Colorado so the cat had to be an indoor cat because of the wild life outside) After carefully reading the instructions to make sure I was doing as directed I had cat litter everywhere. You have to hold the lid in place or it will come open. The next nice surprise is all the crap literally along the sides that I now have to wash off or have that wonderful lingering smell of cat crap everywhere. And yes I am using clumping litter and not the cheap stuff. I drove over forty miles to Pet Smart to get the "good litter". I have since bought a traditional litter box and am scooping daily rather than deal with this tumble and spread crap everywhere contraption. It is a lot less aggravating.going with the traditional litter box.