We really like this cat tree because it is stylish.  Cat likes it too.  The problem is the very top area was designed very poorly with the bubble.  Small Cat cannot even fit or go under it nor can it get out of the bubble once inside.  Nor can our 3 legged cat maneuver it.  We had to keep getting up and down and lifting the cats out of the bubble, so we ended up removing the bubble entirely.  Kind of defeats the purpose of getting this one if you ask me. Kept it because it was past the return date by the time we got it put together and realized the issue