shot it a fair amount, and carried it regularly (she had a Florida CCW license). She never once had a negligent discharge with it. I got to shoot it some myself, so I do have some experience on the platform.
My experience with Glock is zero. Any LE opinions, would an exposed hammer DA/SA be better?
I'm not LE, but I've shot various Glocks, I shoot a striker-fired
FN 9mm with a trigger comparable to a Glock (5.5 lb), and I carry a compact DA/SA (S&W
3913 Lady Smith), so I do have some frame of reference. I'll point out that a DA/SA will be
considerably lighter on the second shot through the eighteenth shot than a Glock will; typical SA trigger pull on a DA/SA is typically 4-5 pounds with a
very short takeup, much shorter than a Glock. So if you have officers who negligently rest their fingers on the trigger, a DA/SA is going to lead to more ND's than otherwise, methinks. Manual safeties aren't a cure-all either, since if the gun is out and pointed, the manual safety will be off.
It is possible to train shooters to keep their finger off the trigger until they are ready to shoot, and most officers have no problem doing so, especially those who come from a post-1970s shooting background and grew up with the Four Rules ingrained. One of the surest signs of a gun enthusiast is that if you hand them a power drill, Windex bottle, or gas pump nozzle, they'll index their finger straight alongside the trigger until they're ready to use it.