This product was very easy to assemble, well designed and constructed. It's a very good looking piece for being a cat tree-nicer than the ones I see in the stores for a MUCH higher price!!! I was thrilled to find my cat was immediately drawn to it, climbing on all its levels within an hour, and even napping on one of the towers.  My cat is a bit over 10 lbs, so it shakes a little when he leaps and climbs on it but it's clearly stable enough to handle his weight.  I am VERY happy with my purchase, and will enjoy watching my cat frolic and use it as a scratching post.