The main problem I have with this cat tree is the assembly. The instructions are a little hard to understand. After you decipher them, it is relatively easy to put together. The structure is a little wobbly, however I have yet to find a cat tree that is concrete solid. The upper house is a little small for my cat. But the dimensions were posted in the description (which are correct). The perches are a little small for my 10lb cat. He "fits" on them. He has to curl up tightly on them when he is laying on them. Heaven forbid he stretches in his sleep because he will fall off, but that is mainly because my cat is clumsy. Again nothing was incorrect about the description. Overall, a good purchase.