I have a Gen IV Glock 34 with a Trijicon Series 2 RMR06 on it that I've been shooting since the end of August.
I have about 1750 rounds through the combination so far, and have shot four USPSA classifiers in Carry Optics so I should have a provisional classification soon. I'm accurate but slow, so I'll probably be in C class like I am in everything else.
I'm taking an RDS pistol class with Modern Samurai Project in May of 2019 that I'm looking forward to.
I find the RDS to be easy to shoot and VERY useful when shooting on indoor ranges with spooky lighting conditions. I had anticipated that I might be a little quicker shooting an RDS equipped pistol but so far that has not proved to be true.