I’m a new shooter (8 months or so) but I can’t believe how my recently acquired red dot has been helpful in improving fundamentals. I’ve only had it for ten days but after two range sessions and constantly dry firing at home, the ‘movement’ of the dot I see on trigger pull/grip adjustment is very helpful. I never expected this kind of feedback. I know it’s not a substitute for sound iron sight practice but I got to say it’s easier to see and adjust my ‘mistakes’ on dry fire practice at home with a red dot on the pistol.