This is my 3rd cat tree of similar style, and while others came mostly assembled (except needing the top screwed in) this cat tree came in 4 pieces.  That in itself is not an issue, however the system to put the tree together is dowels and glue.  Yes I said glue.  I have full-grown energetic cats and I have doubts about the stability of this tree.  After drying all night, it is quite wobbly. My husband has access to a machine shop and will have custom brackets made to secure the pieces, but for the average consumer who does not have this modification ability, you may be disappointed in the stability of the top tiers.     The overall tree is what I was looking for as far as height and design of the tiers.  Just disappointed in the assembly portion.