We purchased this cat tree for our Russian Blue kitten who was 5 months old at the time.  He needed a place to get up and away from our two dogs when they started to irritate him.  We LOVE this product!  The upper hammock is his favorite spot, and he uses all the sisal posts to scratch on instead of our couch.  The only suggestion I would have is to anchor this tree, at its center of gravity, to a wall stud if you have an active/jumping cat.  Ours almost knocked the tree over a few times after his momentum hit the upper hammock.  Since we've anchored it, we haven't had any issues.