I own a cattery so I bought 8 of them. They are great for the cat that throws litter everywhere because theres 95 less litter on my floors. I love that there is no handle grooves at the bottom because it makes it easier to scoop. I had read a few reviews that said the top doesnt stay on properly.  They do, you just need to click it in place with your fingers and besides,  I only keep the top on for my girls. I leave it off for the boys and it still saves a huge mess. I also decided to spend a bit more and use the Arm and Hamner litter. That was the best decision Ive made because I actually go through less litter because its like sand rather than small rocks really.  I would give it a 4.5 Star and thats only because I would like thicker plastic.