My cats love this tree! It was fairly easy to put together but I can't get the top bit on. It seems like you just screw it on but that isn't working. It just spins. Also, some of the screws you have to push through the back get caught in the stuffing and won't tighten if you don't trim the stuffing off of them, so that's a bummer. But all in all, it's a winner so far!