Snapped this up on a great sale with the expectation that my kittens would need to grow a bit more into being able to make good use of it - delighted to have been proven very wrong! They absolutely love it and have had no problem at all scaling up one side  down the other since unboxing. They play super hard and so far this seems to be holding up. Its also the perfect height to fit in front of my window giving them a nice cozy perch with a view to relax when all that climbing, leaping, running around,  launching themselves at each other eventually tires them out!