It isn't a milsim and going into it expecting a milsim is just inviting disappointment. It's closer to a battlesim, with the uniform colours for team designation, (generous) ammo limits, long continuous game and loose plot, but it definitely does not have the structure or overly stringent command control of a milsim event, and it has a lot more trigger time (all the time!) than almost every milsim event. The main draw of the event is the social aspect and the site itself.
I'll be there myself on green team. Looking forward to it, as the last one at Anzio was really good (though needed more players), and this one is both basically sold out and also on a site that looks big enough to actually host everyone, so hopefully it'll be a good one!