Our 13 pound very active 11 month old cat loves this product.  He really enjoys the house, rope and loves to lay on the upper platforms.  We were concerned that the house and platforms would not be large enough for him but he is very comfy.  We replaced the hanging balls with 2 of his favorite toys and he loves them. Assembly was easy and the whole thing is very sturdy.  I believe every cat would enjoy this very reasonably priced product.