my cats love this!! 
The instructions are lacking but the pictures are enough to figure it out. But it is extremely well made much to our surprise as the cat trees you see in the stores sometimes look like they will fall over if the cat walks on it.
We moved the round perch on the right to the very top of the high house because it fits in the corner better. And now it's slightly taller and both cats can be in the high perches at the same time. Our one cat is bigger and likes to sprawl out to sleep so will only sleep on the platforms. Neither use the hammocks except to play a little - I think it's too unstable and slightly small for sleeping or even sitting comfortably. They love the fake leaves and note that they do come apart easily and are made of plastic. But you don't have to put them on. All in all very happy with it!