You have three responses, and you get all giggled like a girl at her first dance.
I think you should do a bit more research into the gear you spend money on than that IMHO.
I have a internal laser on my 20 year old Glock 20. I love mine. The holster I use turns the laser off, but does not turn it on, which is how I would want it. Perfect.
I am sure newer lasers are more powerful in their current offerings, and if you can stand reading a forth review, I think anyone thinking about a laser in their sidearm should look into a guide rod laser if their goal is a gun that has a discrete laser that does not show on your weapon unless you need it.