I recently installed my Lomax, and I'm very pleased so far! Summary:
Customer service: 1 of the rails had a slight scratch in it, I called them, and they sent me 2 ENTIRE rail assemblies!
Install: very easy. I'm used to having to tweak a cover's rails, etc to get them to work properly initially, but this one latched perfectly the first time.
Look: very low profile, super slick looking. The powder-coated (?) aluminum panels might scratch, but no issues so far.
Folding: unlatch works easily, and panels fold easily too. Latching the fully folded group to the front works ok, but could be improved a bit.
I do wish I could "hinge" the folded group of panels up vertically like the BakFlip, but that would prob change their design too drastically.
Weight: I have a full 6.5' bed, so when I remove the Lomax it's a bit heavy/awkward to handle alone, but I don't fully remove it often so no big issue.
Leaks: no leaks yet, but only a couple average rain storms so far.
Cost: affordable, all things considered. $715 delivered (TruckAlterations.com)