My main concern with the 4 hard plastic roof rails running on top of the roof is that when I examined them, they are not only very slippery, even more important is that the plastic flexed and is not solid. If you rely on just these strips for hauling things like plywood or surfboards frequently, there is a very good chance that the bottom edges of the plastic where they meet the roof will wear away the paint on the roof and also allow water to collect under them. These should have been rubber strips that were adhered to the roof so no rubbing and no water could have gotten under them. I will likely pop them off and find some rubber strips to adhere directly to the roof with automotive tape to prevent rubbing on the paint, moisture easily getting under the strips and rotting out the roof and also to have something not so slick. Wish my garage entry was higher, as I would just put a rack on and not worry about it, however not an option for me. Just saying, they should have been rubber.