For what it's worth, I have had terrific real-world experiences with the new laser shifter zr4 (in combination with Veil) including getting saved from a two frontal shots over the memorial day weekend and one from the rear.
The latter one was especially impressive as I was traveling well above the posted limit and had it not been for both the rear zr4 shifter head (and veil g4 on the rear-tail lights) I would have most certainly been tagged with a nice ticket.
Veil Guy