I have a laser grip on my .45, it is my primary home defense gun, together with a Borealis 1050 lumens flashlight.
After the alarm sounded...
My tactic is to get to the bedroom door and from there control the passage way and the living room, with the body protected by the frame and with only my half face exposed, one hand holding the pistol and the other hand the Borealis flashlight.
With a laser is not need to line up your face with the pistol, no tunnel vision, no exposing body parts to get into a shooting position.
If you are going to have a gunfight, this is the best way!
This, for me is the most valuable feature of the laser.
The flashlight with the 1050 lumens (two millions candlepower) will cook the eyes of an intruder.
Colt .45 with laser grips and the Borealis 1050 lumens flashlight.