Haven't used them on the truck yet but I'm initially impressed with the solid quality-- Seems like appropriately heavy gauge diamond tread; Fully welded edges and corners (the tack welds visible inside are just for assembly and get 100% welded on outside; The things I can't correct are well done (good edges, folds, welds, squareness, materials, etc.); Boxes arrived with one door damaged from some fool banging edges but too minor to return. Boxes arrived with doors pretty out of alignment but after adjusting them it's no surprise they could get knocked out of alignment in shipping. One side of hinge is welded/riveted to the door and the other side of the hinge is secured with six 1/4" stainless bolts & nylon lock nuts. DO YOURSELF A FAVOR AND IMPROVE SECURITY BY ADDING WASHERS TO HELP PREVENT RIPPING THE HINGES OFF!! Bolt heads are barely larger than the holes and one had already pulled through the hinge upon arrival. I added washers to make it a lot harder to tear off the hinges/doors (had to replace bolts with 3/4" long stainless bolts. Not really something I'd bash the company for, it was an easy $45 upgrade and they'd have to charge more than that to pay an employee to assemble. Gaskets appeared in photos to be a cheap strip of foam but they're actually rubber bulb gaskets (though they're compressed flat). With the way the doors close/overlap, there's about an inch that isn't gasketed but I don't expect or need them to be automobile-tight.All in all, I'm sure I'll buy more from the same line and I don't mind adjusting the doors for proper fit. I also plan on replacing the locks with higher security Medeco M3s (LSIdepot) to match my other security locks for convenience.EDIT 9/7/20: Finally mounted on truck, first overnight rain left a fair amount of water in the box, more than I can trust to keep vulnerable tools and equipment in which need to keep dry. It appears that the barn doors are properly gasketed but in reality, even a tiny gap will let in water. I may try to tweak the gaskets or more likely move them into the trailer or garage for overhead storage which seems like a shame. Can't recommend for tools which can rust or for supplies which need to stay dry. No work box will be as tight as a double gasketed, rigid automotive frame & door. Not really a knock on this brand or product or design. Now I need to drill drainage holes into the bottom of the boxes, keep tools OUT of the boxes and use large plastic storage bins to keep things dry.