Cats love it! The baby already has managed to get to the tippy top! lol  Be warned, a screw is missing if you want to use all of the extensions for it's tallest form.  Luckily, we only needed one of the pieces for our room.  Also, it's not the absolute sturdiest, so if your cats climb to the top, it will slide away from the ceiling.  Also, would have loved some flexibility in being able to put certain pieces in other places, or facing another direction, and the top ball to be place on a corner or side of the platform than in the middle.  Left it off because of that.