I got the Crimson trace and it is great. It lined up perfect right out of the box. I didn't adjust anything it was right where I wanted it at about 20 ft.
I was worried about the switch since she doesn't have much handle to hold, but it is just fine. Activates easy and doesn't bother my grip a bit. I recommend it. My friend got an ARMALAZER but it hasn't seemed as though he is as happy as I am. He's having adjustment issues. I got free batteries for life with mine. I'm just suppose to order them once each year directly from CT.