It took my two small cats a couple of weeks to really get to using it, but now they routinely crawl all over it and sleep on its upper levels as well as the lower covered "house".  It seems to be holding up well so far, but I've only had it for a couple of months.  Large cats might not fit well on the upper levels but small to medium cats should have no problem.  While they do use its scratching posts, it has not stopped them from also trying to use the furniture as well.  Overall however, I am very satisfied, especially given how high the other prices elsewhere are for such a seemingly simple product.