I found this mouthpiece very difficult to play, the high notes are hard to produce, the articulations are also complicated, it is very open and requires a lot of breath to get a beautiful sound, the sound is much deeper than a classic mouthpiece (series 13 oblige). The adaptation to the profile 88 makes it even more difficult, in short, I'm going back to my old classic mouthpiece, this one I'm giving up on!!! I think it is only for experienced good musicians.