My cat just loves this tree. He isn't allowed outside, he is totally indoor cat.  He loves to climb, he climbs up ladders and anything else that I have out that he can climb on. He goes all of the way to the top to nap, either in the little cubbyhole or on the little platform at the top. . So this was the perfect choice for him. 
It was easy to put together ,and very sturdy. I would recommend this tree to anyone who has room for it.