This is the best item I have ever purchased for my three cats, They spend most of their day lounging on the top perches or in the house.  It was easy to assemble and it is very well built.  They love the hole in the side of the house.

Pros: large platforms, lots of scratch posts
Cons: bottom platform to far from the ground, have a two month old kitten and she can't reach it, had to get a stepstool so she could reach