This box works really well without the lid, if you have cats that like to dig a lot. The high sides keep most litter in the pan. As the other reviews state, the snap locks don't work well enough to carry the pan by the hood. Aside from that, this is a good box for a kitten or a tight space.
Of three cats that have used this box, one had a problem with peeing on the edge of the entrance, due to the size, but the other two larger cats didn't have a problem. If you have larger cats, or multiple cats, do yourself and your cat a favor and buy the full size box.