From the human perspective, I appreciate the clean, modern styling of this cat tree.  Very easy to assemble, although there is a little bit of looseness (though no danger of coming apart) in the shelf attachments --- which I'm concerned could cause it to rock a bit when the cats are playing enthusiastically on it.  But, so far, so good.  I currently have it placed in front of a large floor to ceiling window and the kitties seem to appreciate being able to enjoy the view from multiple levels.  Recommended.