I purchased this cover for my son. I am a mom who does not know much about the Gator covers, but I can definitely get by with instructions for installation. I bought my son a GMC 2013 Sierra 1500 Crew Cab, WD truck. I went onto the Gator site and it said that this cover fit. On Amazon it says it does not. “ IT IS ACTUALLY A PERFECT FIT”. The bed size is 6”7. Install was super easy if you are good at following directions. If not look up video. The clips could be a little tricky, otherwise no screws. I had a screw driver to tighten and a wrench. It is a nice tight fit, low profile, rolls up easy, secure. If you have any slag or sagging it is adjustable to make a perfect fit. Velcro makes an easy tight fit on sides. I was very impressed and it looks awesome. I installed it by myself. My father thought a professional installed it. My son was amazed. He wanted to pay someone. I will say though, my neighbour came out for a minute to help me. The bar that the rolls back the cover was not fitting at first. I had to make a few adjustments while he held the bar, but In the end it fit perfect. I live by the beach, everything here fades etc. and it has not faded and it is a heavy duty material. My neighbour had a hard cover and he even stated that the cover was well worth what I paid. It makes the truck look great and keeps the water out. We checked after a storm and the water only got through the holes on bed rails which are stake pockets. I am buying covers now for them and it should solve the issue . Minimal water came in on edges. You really can do without, but it looks nice with them and complete. One thing I am a little confused with is that I did purchase this cover thinking it would be compatible with the automatic rails. I was under impression you could just use cover and by the system. The remote one was a lot more but I figured if I got the cover I could buy the system later. But I am not sure. Any how great cover and warranty is better than all the other covers I did research on. That is a +++ in my eyes. Thank you Gator.