Have a Holosun EPS Carry green dot on my current EDC. Took a while to get use to it. But I'm good with it.
Have 4 other guns with Optics on them. I prefer green over red.
Only optic I'm not sure about yet is a Holosun SCS-MP2-GR I have on my M&P 2.0 Compact. Not sure how the "no" battery...