Love this cat tree except ONE thing...the 2nd to top tier gives no way to screen in place other than sisal post connecting very top piece. So every time my 17lb cat takes a running jump you here the piece move up and down the screw from below, other than that, awesome cat tree, easy to clean for the most part and the sisal has not starting coming off the posts at all! My cats are scratch fiends on their posts. So very impressed with the quality.