Overall we are very pleased with the cat tree but we did have one incident that was quite frightening.  The kitten was bouncing around on the cat stand when suddenly we heard a cat in major distress.  The string that hangs from one of the tiers wound around his tail and left him hanging!  My husband pulled the string off the hook and we finally caught the kitten and cut the string off.  It was wound up tightly and we were so relieved that we were home to rescue him.  Needless to say we don't let anything hang from the cat tree anymore.  Other than that... we are happy with it.