We just received this product, and, so far, so good. I am very, very pleased with the quality of the shelves and the boxes. One suggestion might be to overlay the top with some kind of low-profile carpeting so that the cats have something to grab hold of with their claws if they need to. That's important for the cat's confidence and safety. Installation was time consuming (which should be expected and obvious anyways), but it was easy to install. The pieces can be arranged in different ways; they don't have to match the picture's arrangement. And you don't have to have studs. We used the hardware and wall anchors that came with the product to mount it anywhere on the wall we desired. I will update when my cats start using it more. They are nervous about the loose ladders, which may mean buying a couple more shelves so they can use and get to the boxes. If we were Sea World, we could train the cats to be okay with those, but I'm not really sure I can, haha. Anyways, fantastic work! This set is truly an efficient, high-quality piece of art!In the picture: The bridge from one part to another is not part of this product. We used it to attempt to keep heavy boxes from hanging over our heads while we slept. Did not quite accomplish that. However, you can see that we were able to split the different parts up in different ways quite easily. Our cats LOVE this product, and two of them have slowly but surely begun testing the ladders :).