Hard time deciding how to rate it as it really is a nice looking cover, but went with two for the following reasons: One of the clamps used to hold the rails to the bed broke into three pieces. I guess they blame me because they sold me a new one,(took almost two weeks) but it's an extremely poor design. On my truck there is a lot of space under the rail which means the round bit supposed to clamp walks upward until vertical which causes the underside of the trucks rail to bite into the hinge. I have photos. Instructions say torque to no more that 120 inch pounds. I went with 115 and have a very good INCH pounds torque wrench which I have used many times with no problems. Never got anywhere near that before it broke. Torqued the others to 40. Don't feel comfortable going higher. Hope they stay tight. When I went to install the locking screws on the rails, the passenger side hole wasn't tapped. Suppose I could have called customer service and let them sell me a new rail since for ?, but that's a hard pass. Had to go to the hardware store anyway. Might as well pick up a 1/4-20 tap too. Never know when you might need one. The pull strap is supposed to have some plastic paddle that attaches to the driver's rear with a screw. The screw is there, but no plastic on the end. Supposed to be some velcro that attaches to the underside of the rail. Three velcro strips on the strap. The first won't reach the rail even with the strap perpendicular to it. The other two are near the end of the strap which extends more than two feet past the end of the tailgate. I think they just threw some random strap on it. Now we get to the drawings. I've been reading blueprints for a living for over 30 years and have seen better on the backs of napkins. Low res, poor or no views of key parts and no display of critical dimensions. I could go on, but have to go.