Easy to put together, sturdy and well built. Heavy enough to stand on its own without wall fastener unless you have a particularly heavy cat. My cat is an adult dsh black and white mog and other cat trees only seemed suited to kittens or tiny cats. This one is tall enough as well as platforms and bed areas being large enough to a fully grown adult cat. She sleeps comfortably on the platform as seen in photo as well as the hammock, bed and the house with room to spare. Only slight criticism is theres not a full sized scratch post, so she has to crouch to use any of the posts whilst on it.