I bought this litter box about 4 months ago for my small adult cat. The depth is great, but I've had to put down some paper towels because urine comes down the back of the box. I haven't figured out how my cat manages to do that. I guess the lid isn't tight enough. She also didn't like the door, so I taped it open. The scratching attachment doesn't do anything. To be useful, the attachment would need to be angled, but it's straight. I'm going to try to find a deep box with a more secure hood. As mentioned, my cat is small, so I wouldn't recommend this box for a large cat.