So I saw Vinny's post this morning and was curious. I've never been impressed with RDS, mainly because I thought it would take too long to get on target. And I shoot well enough (80% or better most days) with iron sights (my near field vision, within a foot or so is getting bad ... had to get some +1.25 readers recently, but long distance still works.... I can pass the MVD test without glasses, for whatever that's worth, and the sight picture is still clear.) Long, long ago I had bought an Ultra Dot (can't recall why, except maybe I was dreaming of Bullseye Shooting). Anyway, I never got used to it, so it sat in the closet for years, until today, after reading Vinny's original sticky. I put it on my Tacsol Pac-Lite with 4" barrel, got a new battery and headed out to the club. I set out a B-16 25 Yard Slow Fire target at 12 yards and with both eyes open just blasted away, stopping only to change mags, and striving to keep the red dot in the center of the black. I have never mastered shooting iron sights with both eyes open, and don't even try, so this was interesting. After the 50 shots I pulled out my binoculars and counted 8 holes in the 8 ring the rest in the 9 with a good chunk of the 10 missing. All I did was keep the red dot on the center of the black (I noticed if the illumination is too high the dot burrs and bothers my eye). I must have zeroed it at one point because it seem centered.
I can see this leading to more expense, just because.