Nice cover, still seems a bit pricey.
The cover arrived in one large box without any damage. Rails were fairly easy to install -- they bend to the concave Ridgeliner walls as you tighten. I recommend test-fitting before tightening to adjust fit to tailgate. The cover itself is pretty easy to install, two people would make it even easier. I found that the rails impede the side-opening tailgate and gouged the plastic. I adjusted the rails higher and shaved a bit of plastic from the corner and it works fine now.
Doesn't fit that well to Ridgeline
The front seal is not that great. On top of that, it was manufactured crooked. I had to peel it off and reapply it so it would contact the front of the bed (I'm sure this compromises the integrity of the deal, but I didn't want to deal with an exchange). The installation instructions were horrible. It should keep leaves and debris out but I don't think I can count on anything staying dry in the bed...