I have only experience with Martin / FIT but would highly recommend it. He's just one of those people who "has it". I don't mean the knowledge, results and whatever - lots of people have that. But the experience as an instructor and some natural talent also in that area (verbal communication, breaking things down into concrete examples, visualization, spotting and correcting errors).
Plus he's just a cool guy all in all. As is Paul, don't be intimidated by his deeperblue persona
