I run mostly OEM Glock for my G22 & G17, but also have some Magpul that are handy, especially when the Glock mags happen to be unavailable. I initially had some feed problems couple of years ago with OEM G17 mags, but after a bit seemed to sort itself out. I have some Glock OEM 10 round mags I got during the Brady bill years, & I use them exclusively as range so they're pretty beat up, but still function after all these years without any spring replacements.