What I like about Boyk is that he doesn't tell you anything. He makes you listen and make up your own mind. The whole business of criticism is nonsense. Boyk likes that. The less they know the more I get to teach them.
Professionals are always off the track.
Laymen's criticism is virtually always right on the button. Unlike Boyk, most professionals don't want to hear laymen's criticism. It's perfect but dead. There's a danger in getting involved with details. Wrong notes, start worrying about exact hand position.