These aren't cherry-picked reviews. These are everyday trumpet players who made a small change and felt the difference immediately.
"I've been working on this for about a week and massive changes -- easier than I thought! Comfort, resonance, range. Thank you for this Louis! Looking forward to the next week of improvement."
"Read through this all over the weekend, played lead last night and came away feeling ok instead of knackered! So definitely an improvement there! Slight changes make a massive difference."
"Just bought the course. Wow. Relaxing the center of the lips. Am a comeback player. Trying to get rid of the smile embouchure I had. This really helps. Playing G above the staff easily is something I could never do! Hit an F above the staff. Crazy high for me."
"Best explanation of correct centered embouchure I have ever seen! Really helped me improve range and bigger sound! Thanks Louis."
"Truer words have not been spoken. Been using Maggio concepts for a while now. Range is better, sound reliable."
"I have found this very helpful. I haven't followed it totally but modified my embouchure as a result. The result has improved my control and sound."