Overall a good product as far as quality of material. We have two cats both between 6-8 lbs in weight. They love their other cat tree that is larger and we had purchased this smaller one for a different room that they like to look out windows of.  Problem is the base of the tower isn't wide enough or heavy enough- when the girls take their running leaps to get on, the tower tips. Hard to have by window for fear of breaking the window. Had to put weights in the base which makes it impossible for them to play/sleep in the base box.