I've CTC laser grips on my Kimber Ultra carry and when I was setting them up I fired one shot, saw it was off a few inches fired another to get a group and started cussing "durn waste of $$$ stupid laser won't even hold zero well enough to keep two shots on the paper!" when I realized that the first hole was now elliptical instead of round! Amazing how accurate these little guns can be.
I don't know what your range is like, but at ours the laser sights are useless if the sun is out. I have to wait for a cloudy day to set them up or practice using them. I think they are a great addition to a SD gun for poor light situations, and if you don't turn them on its just like not having them.
--wally.