The jury is out on these. We had 2 at the NV meeting last Saturday. One was the Laser Genetic and the other was a cheepo copy. I didn't see the side by side comparison but was later told by somebody that the cheepo copy was better. I have gone and bought a cheepo copy cos it was cheap and it should arrive in a month so I can do a review then.
I think, and this is personal opinion only, that the claim that rabbits don't see it is rubbish. They don't associate danger with it but after a couple of times they will. I think it has the potential to be a good replacement for a light, being small and lightweight. But again ask me after I have tried mine.
I also heard that one of the units suffered from poor preformance in the cold weather, possibly the ND3 and that this was overcome by the ND5.
It depends what you want to get out of the unit. Lightweight and long distance? or hoping the rabbits won't see the beam.
TSS