I have been reading and pondering Pop’s contributions to the cyber trumpet community for quite a while. It is clear to me that he is extremely knowledgeable about all the physical aspects of trumpet playing. More importantly, however, he has taken that great volume of contradictory opinion, anecdotes, methodologies, pseudo-science, scholarly literature, and personal experience, culled the wheat from the chaff, and simplified, reconciled, and articulated the best and most coherent of that material into reliable mainstream advice about playing the trumpet. He regularly brings clarity to matters which often grow quite confusing and anxiety provoking.
I find that I have understood my own playing better, recognizing what works and why, from reading his information. Many times his informed opinion has confirmed what I had discovered for myself, but was not confident about. That alone made me a stronger player and more valuable teacher. In many instances, I have applied his suggestions and tips to improve my own playing and that of my students.
I recommend his materials highly.