In my opinion the Esstac KYWIs are the best there is, but they are pricey. Great retention, speed and longevity. I only like HSGI Tacos for rigs where I might choose to run AK mags out of them as well as my usual AR mags. I don't particularly like open top mag pouches with elastic bands around them for retention because it is a mega butt pain to re-insert mags one-handed, and the elastic will eventually wear out and is typically not replaceable. I don't like mag pouches with flaps or bungee over the opening for retention either.