I love the size and configuration of this structure, but the lighter colored carpet that is used on the two upright supports is of inferior quality.  Our cat loves using bath of those places as scratching posts, and they have shed carpet fibers from the beginning.  I am always picking up the shedded carpet threads from the surrounding area.  This happens every time that she scratches there.  Pretty soon there will only be the carpet backing left on these two parts!  I have never had this happen with previous carpeted structures, one of which I got from Wayfair decades ago.  I do not recommend this!!!