Pantac is great for airsoft and other stuff. It'll take all the punishment 95% of people can dish out at it. I've got a rig or two, some bags, lots of pouches, etc... All heavily used and still going strong.
I bought a hydration/knapsack in 07 (I think...) used it continuously for years for gaming/woven on a CIRAS/used as a backpack/etc...and it looks worn now (i.e. bit faded, bit fuzzy) but no broken zippers/straps/clips/stiches.
Put it this way, my opinion is such that I'd buy those same items again from PANTAC....if the ones I have now would ever wear out.
Maxpedition is pretty hard to beat anyways.....I've had a work/carry bag that I use constantly and it looks brand new. I bought a knapsack to use as a BOB and have used it for every AS game (sometimes with a M4 strapped to the side), bike ride and day trip since and it too looks brand new. Their stuff is pricey but tough as nails.