Great tool for low/no light situation. I have them on my Kimber Eclipse ULE II.
I wish CT made them for my Kimber Custom Ultra CDP with the ambi safety!
I prefer these models from Lasermax. They become an internal part of the gun, and don't look so "glued on" like the Crimson Trace models made for the Glocks. Bill T.
I have two lasergrips, one in my Colt Gov't and another in my S&W Chief Special.
I can do thing with them that I can not do with iron sights, I can shoot from the hip and HIT. I can shoot behing barricades without exposing myself as long as I have a little hole or crack to look from. (Like from behind a semi-opened door)
As I don't use my pistol at eye level, I avoid the tunnel vision common with iron sights, the laser is quicker that using sights and I can hit with them in semi-darkness, when I can not see regular sights.
The Colt is next to one of my BOREALIS 1050 lumens flashlights (an eye scorching light) I pity anybody that try to go against this combination.
Here is a picture of the Colt and laser grips and the BOREALIS 1050 lumens and also the Black Bear 678 (720 lumens).