"My sound is now more intense, focused, with a "heavier" core. After very a short period of practice, now I feel that I played these mouthpieces for years. Flexibility is easier, while the "slots" are more defined. The sound is better because the attitude of the muscles and lips is better, so they gain endurance, extension and control over dynamics. Recovery from fatigue is much faster, even in the pauses between phrases.
I made several solo recitals and concerts since using these mouthpieces, in some of them playing all the classical concerts for Trumpet and Orchestra together (Haydn - Hummel - Neruda). Or Mahler's Fifth symphony transcribed for trumpet and organ, or Pulcinella Suite for trumpet and piano. Obviously those programs are very physically demanding, but endurance and sound quality are never questioned! Everything else is... Music."