Being as my cat loves boxes, I thought he'd LOVE this. But it has taken him some time to warm up to it. He is a large cat- about 18 pounds and super fluffy. Once he found out that he can fit inside the box, as well as on top of it, this condo has replaced my lap on the couch at night. Like other reviews, the floor on the inside isn't very comfy so I just put a soft towel inside to help with cushion. He also loves the little toys that hang off of it and will often times just bat at them from the outside of the condo. Great purchase!