We have an older cat so she was a bit hesitant to start exploring, but after a few days she has become inseparable. She plants herself in the to perch and only comes down to sleep in one of the house or goes to the bottom house to eat. This is a great deal, pretty easy to assemble, and shipping was really fast.
If I had to find one recommendation it would be for the construction, while it is very solid and well built. It would be nice if there were some options to modify the how, if, and where specific pieces are used. Maybe instead of making holes in the furniture fix them so they are solid partially cut in various places but can be knocked out if desired. Also by making pole lengths more consistent (max 2 or 3 sizes) the height of various stages could be modified. In my case I had to cut the two top poles in half to accommodate my ceiling height.  This aside the product was GREAT and above all expectations.