Actually, I don't want to rate this positively at all in order to have an advantage over other golfers. However, since I have just started and certainly no longer take a pro career (but you never know) I still say something about it.
The mental coaching of Ewald is the real hammer, in addition to his very cool books, online courses and seminars, I was allowed to experience the personal coaching - Crass! My conclusion: No. 1 in terms of golf + head