So for the what it is worth segment today, here are my observations with regard to the popularity of red dot sights on a public range. Please note this is a wide spectrum of shooters from all different skill sets and economic resources. In addition I have never seen a red dot mechanical failure yet, dead battery yes, loose screws yes, not on paper oh heck yes. But they all have functioned. Hands down by a large margin, Venom Vortex most popular by maybe 3:1 other end least popular, Trijicon followed closely by Delta Pro. In the middle and likely second in popularity is the Holosun(sp?) then the rest and there is a lot of them. For my work guns I use Delta Pro, for recreation I use Venom Vortex. I do not have any Holosun but all indications say they rock. Just some random observations from your local RSO.