I've had this on my truck for about 4 months now and I'm very happy with it. I bought it because I was moving cross-country and wanted to keep the truck bed secure while I was in hotels with the truck loaded up. It performed as expected and it looks good too.It works great. After four months the folds still move smoothly, fit well and secure solidly. I haven't had any real leaks but did notice a little moisture after the truck was snow-covered for a few days. It has come in very handy to be able to secure it open.A few minor design considerations: 1: The installation screws aren't the highest quality. I broke the head of one off while installing the cover. After that I was more careful and didn't have that problem again. 2: There are supports on the inside of the cover that do reduce the effective volume under the cover by a small amount. 3: The locking mechanism that secures the cover to the rails are made of plastic and probably could be defeated pretty easily with a small crowbar. It would be nice to see these as metal but it works great.Overall I'm giving it a 5/5 because I've been very impressed with the overall design, quality, useability and durability.