Past 1100 rounds through mine. 100% function with Glock or MagPul magazines. Just stay very far away from ETS mags, they truly suck. I've installed a Holosun circle dot style sight, the iron sights co-witness in the lower 1/3 of the sight. So far I've had good luck with any good quality ammo and my own hand loads.
I really hope Ruger will soon come out with a mag well for Beretta 92 series mags and one for CZ 75 series too.