By no means would I ever say that any kind of laser sight should replace the use of iron sight or routine practice with iron sights cause they are mechanical, run on battery and are subject to fail. But then again, so is a gun subject to failure. Other then an excellent practice tool, I find the CT laser to be a very helpful added tool on a SD pistol.
Not yet said:
Lasers are very useful for the bifocal crowd. My mother has a very hard time focusing on the front sight and still seeing the target - the dot lets her focus on one plane;
A very true statement.
I wear no-line bifocals and do more practice at SD distances with my ccw without using the CT laser and often practice without wearing my glasses and can hit COM fairly well. Using the CT laser, my groups tighten up dramatically with our without glasses. Especially when double/triple tapping.