For me, night sight work better than lasers. I find that I'm pretty good at picking up a sight picture quickly, but when I shoot with a laser I need to consciously look for the dot.
I definitely agree that everyone should come up with some sort of a plan for low light - just for me night sights fill that role better than lasers.
One thing I will say about them is they make it very easy to diagnose trigger issues at the range. I also like having one on my night stand gun on the off chance my wife needs to use it.
si vis pacem para bellum