Top positive review
Reviewed in the United States on August 15, 2016
Love this cover. Works great with my fifth wheel since it rolls up and stores securely. A hard top or foldable wouldn't work, I need the open space to pull my trailer. It was very easy to install, just needed a 1/2" socket and channel locks to secure the clamps. I installed mine on the loosest setting and haven't moved it since (summer) and haven't had an issue. Hopefully this will be fine in the winter.
I would recommend moving the clamp closer to the tailgate than the directions show, simply to secure the end where you have to push down pretty hard to snap the cover down to close it. Other than that, the mount and cover went right in without an issue.
Will definitely purchase from this manufacturer again!
Update: Moving the last clamp closer to the tailgate didn't help in the end. After opening/closing the cover a few times, the rail slid down far enough where it wouldn't close properly. I ended up drilling a hole through the cover rail and truck steel where they come together. I added a 1/4" bolt (there isn't much room) with two flat washers, lock washer and nut to old the cover rail in place. So far this hasn't caused any issues.
I believe the manufacturer notes there isn't any drilling (or some similar wording) required. This is correct, but you'll have to tighten the back left clamp after opening/closing the cover every few times.
I stand by the above comment about purchasing again, the added work took maybe 5 minutes.