I have loved the tower.  The larger cat I have sits on the very top and loves it.  Thinks he is king.  They play in and out of the 2 houses.  The smaller one wants badly to get at the mouse on the top.  It is sturdy, solid and heavy so no worries about it.  Color matches the room.  I have only had one other tower but was small because I only had older cat, now with 2 love this one.