Well, like the saying goes, you get what you pay for. I have the lo pro and I have 0 complaints. Don't buy the Extang Revolution. Its not long enough to cover the bed properly. After going to the factory in Ann Arbor and two of their engineers telling me that's how it should fit I sent it back. It barely reached the inside of the front of the bed and the edge of the tailgate. The over the rail ones look funny to me now, I like the looks of the lo pro much better. I see cheap ones go by flapping on the sides because the Velcro won't hold or gets worn out. The lo pro is strong and if it did wear out the part on the rail is made to be changed and slides in a track to compensate for expansion and contraction due to temperature. When its rolled up and strapped down it doesn't touch the paint either.