We have 2 cats, a 17 lb male and a little girl kitten who's 6 months old now.  It took a while to warm up to it, and my husband actually made fun of me for buying it in the beginning because they didn't flock to it like we expected, but now, they're on it every day, they get inside the houses and on top of the towers.  I think it's a great place to get away from the poking fingers of our small children. They do scratch on the posts, but neither of them really scratched on our furniture.  It is a bit big for our apartment, but I wanted the best bang for my buck and I believe I got it.