I bought a .40C with Crimson Trace Lasergrip and I really like it.

Set up was easy, the light is vivid enough to see in all but bright noon daylight and is unobtrusive enough so that I can holster the weapon without any snag problems. I've had it installed for about 6 months now and it's always worked perfectly. IIRC, the battery life is around 2-4 years, even if it's left in the 'on' mode