A wonderful new cat tree for my 2 big boys! They are both 16 pounders so it’s always important to find something sturdy to support them and make them feel safe. The tree came mostly assembled-all I had to do was screw in the 2 rear posts and perches and the the 2 smaller perches in front. No hex key in sight! Within 5 minutes it was fully assembled and the kitties were investigating. The only drawback is there are only 2 posts with sisal, the rest are carpeted.