Trifecta all the way... Just bought one a few months ago and love it.
Fastest way to open and close cover. Looks clean, and no rails,snaps, or velcro to deal with. My only concern when I was choosing which one to buy,was that this 3 fold type of cover did not completely fold out of the way (last third next to cab remains) but since getting it, it's never been an issue. The ease of use far outweighs that concern. And if you know you are going to need the entire bed for objects requiring vertical heights, you can easily remove cover in advance, (only two hand clamps to loosen), and its off. Reinstallation is just as easy. In my opinion, it looks cleaner than the velcro/ rail design, as it tends to stand a tad above the bed rails, versus flat across, making it look a bit beefier.(my opinion)