I like a laser on my primary off duty gun, and will have one on my BUG as soon as I can talk "she who must be obeyed" into it.
I do stick with proven products though and don't like being a Beta Tester for anyone. I have a set of Crimson Trace Laser Grips on my Hi Power. I find a laser an asset when I'm without my glasses in dim light.
Without my glasses my tritium sights are a "blur". The laser is a great aide in less than optimal conditions, IMO. I don't know if I would buy these, but would have no hesitation about using a proven product. Maybe if these had been out on the market for a few years, and proven to work and hold their zero, I might consider them.
As it is, there are too many proven products out there to spend money on something unproven. Just my $0.02.
Biker