I bought this tree for my cats, especially the 2 year old male that treats all our furniture like he's a gynmast doing a dismount.  He has been slower to climb all over it than I thought, but he has been very happy exploring it.  I started with leaving a trail of dry food so he would climb up to retrieve the food.  He likes it and has been spending more and more time in it.  He seems to really like the height.  As I write this, he is napping inside the upper box.  The tree is sturdy and have had no problems with sway or bobbing.  It was quick to assemble.  I'm glad I bought it as he's been climbing more on the tree and less on a ledge passthrough between rooms and jumping onto my recliner.