Absolutely delighted with this piece, took a few months to get my lips used to it as I was going from a standard 12C to the 6BS, The hole (throat) is a lot bigger in diameter needing lots more air, plus the cup is a lot deeper, providing lots more flexibility. High notes are tougher but persistence will pay off. This piece has really opened up my bottom register making the notes more stable and richer. Overall it has given me a darker tone ,not to bright and adding lots of power and volume to my playing.