I decided to try Papurr right away, and Willie has had no complaints, even when I have "Ooops, I was supposed to clean the box this morning" moments. He really likes to get in his box and dig (boy, am I glad I bought a covered box). The only real problem? He tracks it everywhere! I bought a little mat to put in front of his box, but it isn't big enough. Still, if that's my biggest problem, I think I'll stick with it.