That thing is a piece of garbage, nobody waste your money.
My grandma got one off of an Infomercial, and it's just ridiculous how crappy it is. The thing clogs if your cat poops out anything bigger than the size of your fingernail, it spills the kitty litter out over the edge sometimes, it falls apart and it's a pain in the ASS to get open and clean (because yes you still have to deal with all that cat crap eventually, all this thing does is get it out of the way of your precious kitty's tush...).
On a scale of one to ten, this thing weighs in at, at best, a 1.5...
PLUS it scares the bejibbities out of your cat... which is actually quite fun to watch... lol...