I don't know where you live, but if you ever came to the westbank on a weekend, I could probably sneak off from daddy duties and let you try out a RMR on a glock. I have 5 RMR's. and none of them have given me issues. 3 of them are mounted on pistol slides (Glock 34 MOS, Zev Tech d17, and FN-T) and one is mounted on a machine gun
I like them both. I shot both the zev tech dragonfly and salient tier 1 in model 17 flavors, and though the salient felt better in hand, the zev tech shot better and more consistent for me. Not saying it is better overall, just saying it works best for me.
I have a factory pistol, but I have also bought a few triggers, and will say there seem to be some inconsistency between triggers. Some of mine feel noticeably heavier than others while using the same spring set up, my factory zev probably has the nicest trigger of the group.
Hey man, I am a glock fan and have a couple of 19s. I have a Smith & Wesson M&P 9mm C.O.R.E with a Trijicon RMR 06 and I can tell you that I like it enough to be putting them on my glocks as well here shortly. The RMR is the way to go, it awesome! You won't be disappointed.