Since we can't test years' worth of wear and tear, we will make comparisons to a bag that has already gone through it! We will be comparing it to my Targus 17-inch laptop backpack which has served me well on nearly a daily basis for the last two years, and see how Slappa's M.A.S.K. compares.
Slappa M.A.S.K. Targus 17-inch Laptop Backpack
Here, you can see the the handles are almost identical, and since Targus' handle held up so well, I'd say that's a good thing.
From there, you begin to see where the M.A.S.K. pulls away. The larger, all-metal zippers of the M.A.S.K. dwarf the rubber pulls and smaller zippers of the Targus backpack, which is an often overlooked, but essential feature. Broken zippers render a backpack useless.
The Targus backpack uses a very tough, and, over the years, obviously durable nylon material, and the M.A.S.K. has a stiffer, stronger-feeling nylon material, so from the build materials, I'd expect nothing less than years worth of solid use, putting every penny of the price tag to good use.
The M.A.S.K. also has thicker shoulder straps, and more padding on the back.