Anyone running HSGI's X2r/p pouches?

I’m building a belt and ran across these on HSGI’s website. Seems like a good idea in theory but wanders from the high speed, low drag concept in practice. Seems to me like they’re too bulky and would get heavy quick if running a few of them.

Are these things as bulky as I think they are or are people running them without regrets?

I wouldn’t stack mags on a belt if I could help it…