Nothing against HSGI, but I've never been one in favor of bungee cord support of anything, be it mag pouches or anything else. Bungee cords are, simply put, are elongated elastic cords encapsulated within a suitable nylon shroud. The elastic wears out over time, no matter whether it is used or not, and exposure to direct sunlight and/or fine sand/grit accelerates the process.
Fine for what they are, but for long term use, without re-supply of bungee cord, not acceptable. Note that HSGI supports their products with kits to replace said bungee cords. All well and good, and credit to them.
YMMV, but I prefer to buy purpose-driven pouches that don't need bungee cord to do the job. Over the years many such pouches appear, if you scan the internet and this forum often enough.
Let's say one is forced to low crawl through rocky/gritty terrain for a considerable distance.. Those bungee cords will suffer, and not last long thereafter.
Then where are you, with no immediate re-supply?
Again, nothing against mfrs of bungee cord items, but something to think about. YMMV.