My SP-01 Tactical's slide is on its way to CGW for milling and installation of a plate for Trijicon's RMR/SRO.
I have been using a 3.25 MOA RMR Type 2 on a FNX-9 -- milled by Parker Mountain - with great success. It really aids my aging eyes. My ability to resolve the Point of Aim is much better with the RMR than with iron sights, particularly beyond 20 feet and out to about 50 feet -- ranges I haven't been able to shoot at accurately for quite a few years. It also highlights how critical trigger press is, as the red dot moves around a lot if I don't do my job. This carries over to better trigger press (and grip) with other pistols with iron sights.
I am going without the Trijicon base plate that has a rear (elevated) iron sight; I will use the one that CGW makes for the RMR/SRO. I will keep the stock front sight on the pistol, but presume it will be below my viewing angle through the RMR (it will be removed if it is in the way). I don't anticipate using this pistol in a SD role and can live without iron sights to back up the red dot sight.
Eventually, I plan to get a SRO -- because, with my RMR on the SP-01 Tactical, the FNX-9 now is without a red dot sight of its own.
Any experiences with CGW's setup are of interest to me. I have developed a lot of confidence in them from three or four instances of their work on my CZ's or selling me parts (that always seem to work).