I went with the Black DiamondBack HD and I LOVE IT!! I decided on the HD because we do a lot of activities that we could sit on the top of the cover, put coolers, feed, etc. I have had it for 2 years. It have been water tight and feel like it is like a trunk. Feel completely comfortable traveling with items I want to keep safe. The only thing I wish I could do is access the front easier. I just didn't want to drill holes into the bed to install the one that had 3 panels. That was a choice of mine, no fault of Diamond Back. If they design a 3 panel that I do not have to drill, I might upgrade.