I regularly use my mutes in the Sequoia Symphony and the Fresno Philharmonic. Below are some thoughts from others who have been using them.
Josh Rzepka has done a VERY thorough review of the Gen 2 Dedicated Cup and Multifunction Mute:
Jens Lindemann, International Trumpet Artist
The S-Mute is one of the finest mutes I have ever played. The intonation is impeccable and the ability to make micro adjustments to create numerous different colours is a reflection of the fantastic thought and workmanship that has gone into its development. Quite simply, this is a mute that should not only be owned, it will be used for ones entire career.
Ron Franklin, 2nd Trumpet Fresno Philharmonic Orchestra
I love playing this mute and use it often! It has a wonderful tone color, is free blowing and most importantly, plays in tune in all ranges and dynamic levels. I highly recommend it for all orchestral trumpet players!
Eric C, Music Educator Clovis, CA
Wow. This new S-Mute is amazing. Love the sound. Ease of blow. Tuning is spot on.
This mute instantly corrected some of the tuning issues I was having with my other cups, and playing the mute has a similar feel to playing open, which makes it easier to hear myself and produce a good tone. Great mute!
See here for many other reviews in my thread on Trumpet Herald: