I've personally hosted a MilSim game myself. It was The Midwest Sniper Cup 2008. A lot of fun to say the least, and it definately takes it up a notch, almost to the level of actual Military Training Simulations. The only downside of course is that age and actually looking the part can take effect majorly in this, because in MilSim... It really ruins the flavor of the game to see (And I don't mean any offense to anyone) a 14 year old decked out in gear with hair down to his shoulders. However, a lot of members on my team have attended Northern Wind and Operation Lion Claws events and they have had nothing but great battle stories, some that can only be matched by living the experience first hand.