We purchased this very large cat tree as part of converting an indoor enclosed patio and creating an attached Catio so our kitties could play indoors and out!  At first none of the three cats knew what the tree was and I have yet to see one of them scratch on it. However, each eventually found spots that were "theirs" and claimed their territory.  When it is raining or blowing, the cats will claim a perch or a hammock bed and watch the bad weather from the vantage point of their cat tree.