So as the title reads I would like reviews from ACTUAL USERS of either of these Aimpoint Sights. I am in the market and would like to know if there are any real advantages to either (especially the M4 since it is several hundred dollars more). If anyone has some experience with either please feel free to chime in and and share your thoughts! Thanks All!! And yes, I can google them both and read reviews all day long! I want real, personal input!