I bought this mouthpiece for a student (beginner) because the old one (7E) was in bad condition.
The first note he played was amazed at the ease of producing sound. It is a mouthpiece that produces a sound with a beautiful tone, in my opinion one of the best for those who are starting, especially for children up to 11-13 years.
For more advanced trumpeters it is also a good mouthpiece, but there are others that produce a fuller sound (1C).
My kid plays the trumpet and sometimes the original mouthpiece to the trumpet "disappears". I thought it would be good idea to have a backup. I can't tell the difference between this one and the one we already have and that to a very nice price.