He's right regarding the Committee... But I am blessed with the valves faster than my Recordings on that horn... but this horn is a dirty slotting horn, and that's what give it the beauty I enjoy in playing in small jazz ensembles. Therefore, I like a mouthpiece that gives me room to play with additional puffs of air, to give the Committee more material to color with. I love the Harrelson for a completely opposite reason. That horn is as accurate as a laser. In all ranges. For that a mouthpiece that directs the flow into the horn is the best for me. I like the Jettone Studio B with that horn.