I have a rescue that is the sweetest, most lovable cat ever. But, he attacks my other cats and pisses on things if he isn't being watched. My options were to find him a new owner (good luck with that), cage him, or put him down. This pen was the answer to my problem. It's large enough that I don't feel guilty about him being locked up when I'm at work or busy around the house. He seems quite content being in there and spends time in there even when the door is open. His covered litter box fits on the bottom shelf and the litter stays in the pen. He likes to move from shelf to shelf, so he gets exercise. I shopped around and the price that Vet Depot has this listed at was way lower than any other site that I found. Highly recommend this pen. The product arrived even sooner than they said it would. AWESOME!