Thrilled with this purchase and so are my two active young cats, Chip and Alex.  I'm shocked I could get a cat tree this well-made for such a really reasonable price AND the giant cardboard box it shipped in as a bonus ... a "kitty fort" in my sunroom.  I needed no tools for the quick assembly.  Just a few turns to screw the bottom of the top post into the rest of the unit. This was my first purchase of anything from Wayfair and I plan to keep using them for all kinds of things.