I was playin with my new EOTech 512 Rev. F the other night and I noted the following:
1. At any reasonable setting I was able to see muzzle side signature. I determined this by turning off the lights in my bedroom and pointing my M4 at the mirrorred closet door. If you stand close enough, you can see the reticle just as if you were standing BEHIND the EOTech. Maybe it's not visable from 50 yards, but it sure is from 10-15 feet.
2. With the brightness settings turned up all the way, there is a red reflective glow that lights up my face - not terribly, but it IS there. I freely admit the settings were too bright for night time use, but still, there was a glow.
Now, I'm just a weekend warrior, so I really don't care. I was, however, dismayed to see EOTech's claims so easily disproved.
I do like my EOThingy, though. It's a keeper.