I have trained with instructor Sifu William Kirkham for over four years. He is a master in mixed martial arts specializing in wing Chun kung fu, aikido, wrestling, boxing, muai Tai and is well-versed in every aspect of mixed martial arts. He has been a student of martial arts since he was three years old from his father and has a vast knowledge and has amazing ability for what he teaches. This guy is definitely the real thing.