Some of the rules wording requires more than a once-over to grasp the implications, but this is the most detailed martial arts system I have seen to date in a d20 based roleplaying game. Attacks are broken up into zones (headbutts, punches, and kicks) and you get special abilities in those zones depending on what combat style you choose with your feats. You can get special "finishing" moves, such as elbow drops that deal large ammounts of damage when the opponent is prone. Over all, it allows for a complex and detailed hand-to-hand combat system that i would suggest for anyone who liked monks in DnD but found them bland. This system is best suited for d20 modern though for making martial-themed adventures.