John Whitman is literally the guy who "wrote the book" on Krav Maga, along with Darren Levine, the head of Krav Maga Worldwide in Los Angeles.
From what I've heard, Mr. Whitman is a teacher's teacher - very clear instruction, very educated on teaching methodology, and concerned foremost with creating Krav Maga instructors, not just professional demonstrators. I did an Israeli martial arts certification years ago and while the training was great (and thorough), very little was mentioned on how to teach it. I've been told that much of KMA certification is directed toward the proper way to instruct.
I'm always looking to improve my teaching game, so I'm really looking forward to this one and bringing what I learn back to Norwich.