I am not a big fan of "laser lights" on your SD handgun; they just seem to be more of an expensive gimmick than a real asset. I have found that in a self defense situation you only have seconds (if that) to react, certainly not enough time to flick on a laser - acquire a target and send one down the barrel. Now on a tactical rifle where you may have a bit more time perhaps there.
I know others will disagree with me on this and that is fine. Because if you practice hard enough with whatever you have, you will become proficient with it.
Save your money on the laser and spend it on some home/self defense instruction. That's money well spent.
Just my 2 cents.