Easy to put together--our 2 cats used it right away.  They are exploring it more  every day.  Both of them use it at the same time, it's good exercise for them and are animated to play more often.  Construction is good: they rake over the fleece with their nails and don't damage the covering.  We looked and looked for this equipment for many weeks--just what we had in mind.  From the top of the pedestal they connect with a cat-run over the lanai sliding glass doors and have 14' of walking and fun space.  At the end of the run is a 'cat lounge' in the corner so each of them have a 'nest' to sleep in:  one in the house on the tree and the other one in the corner of the run.  They like being up high.  Jim Hawkinson