I haul my entire kit weekly in these bags and I did a small tour with them. They saw road use with no signs of wear, and kept my kit safe. They are stiff and sturdy, thick nylon weave like cordura, the walls have extra padding which is firm to protect from drops, the top and bottom are reinforced with a hard disc. You cannot find better bags.
The only thing you could want more is a full hard case, but in my opinion these are so good you don't even need that if you are hauling your kit yourself or with other musicians.