I have the HD version on a 2019 Ram 2500. Mine has been on the truck about a year. I like the fact that it is lockable and secures the bed of the truck. My HD model can hold up to ~1,500 lbs on top of the cover- which essentially turns the truck into a flat bed. Anything that doesn't fit inside, gets strapped to the top. The Diamondback is pricey, but I highly recommend.
I also have an ARE bed topper on my Tacoma. The ARE provides the same security and weather protection as the Diamondback. I went with the Diamondback on the RAM for the aesthetics. I have no reservations recommending the Diamondback or the ARE topper.