My felines love this cat tree.  A little catnip and we were off to the races.  I have one 15 lb Maine Coon mix and he sends the tree swaying when climbs it.  The base could be wider to minimize this.  Very easy to assemble, sturdy, just a bit wobbly if left out in the middle of the room on plush carpet. Pushing the tree next to the wall took care of this issue.