I received the mouthpiece last friday and I´veen playing 2-3 hours a day now and I really don´t know what to say or how to put the feeling in words…I´ve played soprano for many years and I´ve had my “mouthpiece hysteria”, which means I have really tested them ALL…but this piece is something else.. I can experience total freedom in playing. Every tone just SING…It´s like it reads my mind :)))) For me the most importand with mouthpiece id the feeling and the Open sky2 is all about the feeling. Just amazing piece!