I’ve known John for 20 years and trained with him in various classes and worked in the streets with him. Very smart, very intense and doesn’t just talk about it, he lives it. There is nobody I’d rather have next to me during a situation, no matter how bad it got. And I’d trust him with my family and never have to worry about their safety. John is one of the best teachers, coaches ( no matter the discipline)and/or men I’ve ever met. He has mastered the discipline and used it before ever teaching it.