I live in the Chicago area, and am not sure of what police use here.
I am happy with my x50. I agree with some opinions in that it seems to go off just a few seconds before I see the cop.
ZR3-I like this becuase it is installed very easily with the x50---infact, I didnt even install the zr3 display, becuase it can be read via the x50.
I got hit with laser only once so far.
Does this laser vail really work???