Well, it was easy to put together; I did it myself.  It's tall enough for both my cats to give a good stretch, but two things: one, it's overpriced for what it is, and two, there are little pieces of fur from the base all over my living room floor from where it comes off when the cats scratch on it.  It doesn't tip over when they do, which is another good thing.  One of my cats is 18 pounds and can be quite rough.