I have many cats. they tear up cat trees like nobody's business. Cat trees are expensive, so I don't buy a lot of them. I couldn't believe the price on this one, but with all of the great reviews, I went ahead and bought it. Free, 2-day shipping -- awesome.  Heavy-duty, really TALL cat tree that even I, the instruction-challenged, was able to put together. The cats were playing on it before I was even halfway done.  4 cats at a time climbing and scratching and playing with the dangling toys and it didn't even wobble.  They do argue over occupancy of the box portion. So far, Petunia has won.  Get this. You won't be sorry