darrentoma
Member
I'm looking forward to seeing if the Extang Tri-fold works. It seems to be the easiest to use, easiest to install, nicely priced, good looking, lockable, it's out of the way of cargo and rear window.
This type of trifold seems to stack up equivalently in height compared to a rollup:


But the trifold stack will also extend back toward the hitch by +2' (on a 6.5 ' box) vs only a couple inches to the high point of the rolled up tonneau. Just seemed to me when looking at them that the sight lines when hooking up would be a lot worse for a trifold like this than for a roll up (might not be an issue for other pickups though).
I can see the possible advantage of the trifold securing things when travelling hitched -- but for me it was at least having a chance to see my own hitching in process (such as fastening a fresnel lens on rear window). This might not be a big deal for some -- most truckers cannot see anything when hooking up. And until the advent of rear view cameras anyone with a bumper pull did this all by sense, feel or another set of eyes outside the cab.
My Truxedo Lo Pro was very easy to install also - I think many of these basic types with clamped rail systems are pretty easy to DIY.