I am SO pleased with my cat tree, but not nearly as much as my cat. She has found it to be an excellent jungle gym, and while she doesn't use the hammock at the bottom (she's too big), it's become a good place to store her other toys. It's very sturdy, and the sisal rope has held up admirably under enthusiastic scratching. One of the toy dangling mice was missing upon arrival, but I hung one of her own mice up instead and she doesn't know the difference. As a product, I am very pleased with it.
However, buyers beware the instructions: they make NO sense! Rather than a traditional instruction manual, with written instructions and clear illustrations, these instructions consisted entirely of crude line drawings that looked like a fourth grade art project. What should have been a fifteen minute assembly for me and my friend ended up taking the better part of an hour because we kept realizing we had used the wrong pieces, or the wrong fasteners, or had something on the wrong angle. The instructions gave us very little.
On the whole, I would buy this product again, but please--update those instructions!