The problem isn’t really the product, but ZooPlus Customer Support’s attitude
I bought the cat tree a few years ago, and it held up pretty well until a few weeks back. My tomcat K. climbed into the top nest, and at that moment, one of the middle sections gave way and the whole thing broke in the middle of the night. K. fell and got hurt—only luck kept it from being something really serious, otherwise I would’ve taken ZooPlus to court. But even so, when I asked them if I could buy a replacement section, they told me it wasn’t possible. Very disappointed and unhappy.