My cat doesn't use the top exit, but that's OK. He uses it like any other litter box, and the swinging door keeps him from kicking out the litter out of the box when it closes. So, there is a lot less litter outside the box, which was the purpose for getting it. 
The drawer is a bit flimsy and we have to be careful when pulling it out and pushing it back in place. It does look good, just wish it was sturdier.