Great product. It was fairly simple to put together, especially if you have assembled similar items. The instructions are easy to follow if you can orient the diagram with the structure you are assembling. Two people working together makes short work out assembling the cat tree. Though sturdy enough for our heaviest cat of 17 lbs, I docked a star for lack of padding on the different landings. If it were possible to rate another half point I would rate it 41/2 stars rather than 4 stars.