We have a 15 lb male Ragdoll who has finally taken to it 2 days after delivery! He loves it! The little nest on top is really hard so I added a soft towel. He's happily ensconced in there today! It's the perfect height too because the little nest leans against the window sill supporting his weight. I'd be a bit worried it might break or topple over otherwise. He's a big boy! He gives it a thumbs up!