I thinka lot has to do with the individual setup. I have had lasers on cheaper guns, "armalaser", and it was really worthless.
When I picked up a LC9, it was the last one, and had the laser on it. I wanted the pistol so I took it figuring I could always take it off.
Surprising enough I sighted it in at home, in my hallway, about 40 feet. I used the doorknob on my front door as the target, and set it up at point of aim.
Went to the range, and fired 2 boxes, and was amazed at how accurate the thing was. I expected the same result as the previous amalaser on the pf-9. This thing was dead on the money at 25 50 and 75 feet. I could not believe how accurate it was. Since I carry that one all the time in my pocket, it's nice to know that I have the option of using it at night when I am out with my dog, or anyware in town. It would have come in handy as mentioned in that movie theatre incident. Even with minimal exposure you could have put the dot on the guys head and that would have been it for him.
I never liked them before this one, and always used night sights. Now I think your carry gun should have a set if you can get someting like the Lasermax or CT. I wouldn't use them as a substitute for shooting a threat quicklly if that came up, in other words I am not going to look for the dot before I fire when my life is at risk, but it has it's place.I couldn't see the bullseye at 75 feet, but knowing where it was, the blurry dark spot, was enough, as long as the dot was on the dark spot of the target, that is where the round went.