This is quickly becoming one of my favorite promotions to watch. Compared to most, the rules are a little strange. No Closed guard No striking the head on the ground You may elbow or knee only if wearing pads Headbutts to the body are leagal There are more, but those are all I recall from off the top of my head. The standup is just like any other really, but once the fight hits the ground it's amazingly active since you cant stall by closing your guard and you have no fear of being hit in the head, so it's almost like a no-gi grappling match at that point. Last I saw there were some events on the tracker, its definately worth checking out.