With 4 cats, I purchased two towers by Archie & Oscar and we all love them.  This tower is in the bedroom in front of large windows with a ledge.  The cats love to jump onto all levels including between the tower and the end of the bed.  My cats are front-paw declawed and they have no trouble navigating the levels and still love to use the sisal sections to stretch against.  Three of the four love to lay on the upper-most platform as a good defensive position against others in a battle for King-of-the-Hill.