The platforms are far too small for our cats (14-17lbs).  The ladders are also a bit too steep to be of any use.  The whole thing is a bit unstable.  Additionally, the bolts are exposed on the surfaces, so their claws can get caught.  On the bright side, with some tools, wood and some fabric, you can dismantle it, reupholster it, and add some larger platforms.  We spent an extra 100 bucks making it stable, safe and more appropriate for average sized cats.  Total cost was about [$] and I know you can't get a cat tree like this for that price anywhere.