Unfortunately, this cat tree just isn't for my cats. I would suggest this for kittens or small cats. I have a 12-13lbs male cat and a smaller 8-9lbs female cat. Both have difficulty moving around the tree and it constantly rocks when either one is on it. It was pretty easy to assemble but I don't think it will last long with these two. I will say the scratching posts are durable but a bit short so my male cat has some trouble getting a real good scratch. The upper round "hammock" thing is small ...Unfortunately, this cat tree just isn't for my cats. I would suggest this for kittens or small cats. I have a 12-13lbs male cat and a smaller 8-9lbs female cat. Both have difficulty moving around the tree and it constantly rocks when either one is on it. It was pretty easy to assemble but I don't think it will last long with these two. I will say the scratching posts are durable but a bit short so my male cat has some trouble getting a real good scratch. The upper round "hammock" thing is small even for my smaller female. When she sits in it, it bends under her weight. She tends to trust much more than I do.