I have 3 cats. 2 of them are 15-16 pounds of muscle and the other is a little 7 pound kitty. They were playing in the houses while we were trying to put it together and have refused to come down since it got put up. Lol. They positively LOVE this house and it's very sturdy. We left out the suspended bridge and the cats enjoy the extra jumping space. Excellent buy for your money. :) I would highly recommend this cat tree to anyone with larger cats. The houses are large enough to accommodate even our biggest boy (who is the size of a small dog) comfortably.