It took a little getting use to using/finding the dot at first. Once I had practiced /shot enough it became a lot faster as did my times transitioning from multiple targets. I shoot all six classes in GSSF and use the G-35 in Unlimited. I solved the problem (for me) as far as going from RMR to irons by using Ameriglo .115 Red fiber optic front with a .140 Black rear on my other competition pistols. Another benefit for my 58 year old eyes is that with irons I have shooting glasses made to clearly focus the front sight at arms length as I normally wear bi-focal's. With the RMR I have no problems acquiring the front sight even with bi-focal's which is nice when I CCW the G-22.