omg my big boy is like 18 lbs and he actually fits in the little house thingies!!!! usually these things r so small but the two houses on this one are legit huge. he loves the hammocks too even though i thought he might be too heavy lol. it took me like 45 mins to put together by myself which isnt bad. super sturdy which is good cuz he jumps like a maniac. definitely worth the money if you have big cats.