I have big cats, so I had to read a lot of reviews for the perfect tree. My cats couldn't wait for us to get this one built! it's nice and tall, over 5.5ft and the square house is large enough for 1 1/2 cats to fit into. yes we had two try and get into it at the same time, and they fit! It's difficult to find things for larger cats, but I definatly recommend this for not only the price, but for it's size.