Krav Maga Northampton, what is the KMDA academy like?

[Fox]

Hi, I`ve been looking into martial arts close to me and there is a Krav Maga academy about 1/2 hours travel by bus. I am would be interested in doing an authentic version of Krav Maga, (not quite sure how other versions differ yet). The place is called KMDA (Krav Maga Defense Academy) and it run by a gentlemen called James Hobson. They have a few venues in Northampton, Bedford and Milton Keynes, has anyone trained there or trained with James before? Where did the instructor learn and get qualified?
Any more info is appreciated and the website is - KMDA | Krav Maga Defence Acedemy - Krav Maga Milton Keynes