I wanted to wait a while to see how this tree house held up before I reviewed it (the last one I bought, I reviewed it too early and it fell apart over the next couple of months).  This one looked a little bit more compact, the taller and more complicated they are, the more they seem to fall apart.  We have 1 cat and 5 9mth old kittens, they all LOVE to play on it, and sometimes 4 will try to all sit on the top perch together!  The top will start to wobble then, they like the hole at the top of the ladder.  I didn't think they would use that, but they do. It would have been nice if the top perch had sides to it, like the lower perch. Fits in a corner nicely.  So far its held well to have 6 cats playing on it.  I would recommend.