You guys might want to look for a rope since I've dug up this almost month old topic, but I think it's a good one with a lot of expert advise.
I've given it some thought since I just got my P3AT to go along with my full size Glock .40 caliber that I've had for several years, and I just finally broke down and got a pocket pistol for those times I couldn't really carry the Glock.
I'm a pretty good shot with either pistol and have past training, and combat experience, so I know all about muscle memory and reacting rather than depending on thinking, sight picture, or looking for that little red dot under stress, and agree 100% with those who have been there and done that!
I can only put myself into the shoes of someone who doesn't have the experience or time to train, or who hasn't ever been faced with a situation that meant fast reactions in a life or death situation, but I do understand why someone would feel that a lazer would be an advantage to someone in that category, and I would have to be inclined to advise them to go for it!
You need to have a mentality that if something were to happen that you have the confidence that you can come out on top, and if a lazer will do that and boost your confidence then that is all you can ask.
Anyone who doesn't train, and could end up in a bad situation will be looking at the perp, and they won't have the time or muscle memory to even attempt to aim, and will more than likely be pointing the gun in the perps direction so that little dot could just make the difference between hitting him, or just spraying lead in his general direction.
I don't see myself getting a lazer personally but I'm not going to rule it out all together, but with my aging eyesight I'd probably have to figure out which of the three dots I would be seeing, was the one I needed to concentrate on.