Got a RMR02 on. G17 since about 2010, no issues and still on original battery, though a lot of night stand time and 700-1000 rounds. An RMR06 on an M&P .45 mid-size on since 2102 with about the same round count and no issues . Finally an RMR06 on a G19 on he way to a Roland Special for a year and 700-1000 rounds, all good.
All milled and installed by L&M Precision, first in AZ and the last two in Carolina. All well done and with the base plate.
Mine are all good and reliable. More accurate than I am. I'll do a write up on all three when the KKM barrel comes in on the last.
But I'm a happy shooter with all.