In my multi-cat household, this piece is not one of their favorites but one cat does like to sleep on the top every so often.  When my younger cats were kittens, they did play with the holes in the cube and pawed at the toys while pawing at each other through the walls as well.  I have had it in the house for about a year now and it hasn't been destroyed by the cats but not heavily used either no matter where I try to locate it.  So I would consider it OK at least.