I used them for a long time in the mil (M9, M11). I prefer the striker fired system of operation or SA (1911) because every shot is the same- whether it is the first or the last one in the engagement. Also, no need to decock before reholstering. As a trainer, eliminating the DA presentation shot and decocking process saved us lots of time and trouble for newer pistol users. On the other hand, there are people at the AMU who shoot the M9 better than I could shoot any handgun, so its different for some individuals.