Expect some set backs in your shooting but then you will shoot better than you ever have.
Or not.
Today I took my Q5 with a Vortex Venom to the range
for the very first time. Here's a pic of my first 15 rounds fired at 15 yards. (I think the 3 "flyers" were just me getting used to the incredible trigger reset.)
I'm in my 50s and my eyes aren't what they used to be either. In short, I'm IN LOVE with this entire set up. The Q5 itself is comfortable, accurate, quality built, soft shooting, and totally reliable. The Vortex was easy to acquire (probably the hardest part of an RMR), and eased my mind that I should have gone with the more expensive Trijicon. The red dot brightness is adjustable and the MOA worked well for the pistol distances I was using. I just used the dot as my point of aim, squeezed the trigger, and voila, the point of aim turned into the point of impact. Being old school, I was very prepared NOT to like this red dot on a pistol, but I am pleasantly shocked at how very easy it was to shoot this gun very well using the set up.
I'm already planning on adding an RMR for my Sig Legions. Good luck with your choice, I'm sure you're going to love it!