I do like the ring/dot over just dot, helps me acquire faster. However I don't like how wide the ring is. Only complaint on my end right now. As far as batteries go I think I could suffer with a N type but I would definitely like the availability of the AA. This sight will eventually make it onto my SHTF rifle and I still need to decide caliber and platform. Leaning toward a 5.56 but would like that 6.5 or 6.8 for good measure.
9mm vs 45 ACP? The answer is 42.