I'm a little surprised at all the folks arguing against lasers who are not thinking practically.
A laser can give you an edge that can mean the difference between life and death. It lets one keep one's eye on one's target, rather than using sights or not using sights and missing.
It can be intimidating too, in the right situation.
It can be used in weak positions, and it doesn't require one to have one's head behind the gun.
It is not always about long range; sometimes it is about fast target acquisition at short range.
Please, guys: don't knock it until you've opened your mind and given it a serious try.
A lot of the scenarios pointed out on Crimson Trace's site are quite realistic: getting knocked down and having to shoot when one is laying on one's back, for instance. (Chapter 5 video from
this page)
Hitting moving targets more easily. (Chapter 4 video, from the link above) Shooting around barriers and only peeking one's head out enough to see, but not enough to make a big fat target. Shooting under a car (from cover) accurately. There are many other scenarios.
The nay-sayers should put off their next gun purchase and try a CTC grip on their home defense gun. I bet you'll change your tune, if you go into it with an open mind. I know I did.
My only regret is that I cannot afford to put them on all my guns.