I love top entry litter boxes firstly because by dogs like to eat the cat poop, and because it really helps keep the litter inside the box. The holes on top of the lid also help with that. They also make me feel better about the cats going in there because it probably keeps in ventilated. The only thing I dislike about this box is the bottom has a big ridge on one side. And my 3 cats chose that side to always pee on. So, even though I have a really good clumping litter, I have to take the corner of my scooper and go around the ridge to scrape the pee out of the crevice, making it crumble and fall through the scooper. Also it's a bit small for fat cats like mine. So personally, that's enough to make me want a different one, but other than that it's great. I'd recommend it to someone who has a fit cat and uses litter box liners.