This is the first cat tree for our two 15 lb. plus kitties, so we wanted a sturdy base and not too tall.  They loved this from the very beginning.  Both viewing platforms can see out the window, so they spend the day switching places.  The sisal posts have also saved wear and tear on our furniture.  My husband put it together in 10 minutes and it was an instant hit.  Don't know why I never got one of these before.  I think I need another one.  Good quality and service.  Very pleased with this purchase.  5 meows!