The Isotope is one great mouthpiece. It plays with just the right amount of edge and fatness. It's comfortable playing loud or when subtoning and it doesn't lose tonal character in any range or dynamic. If you need to play loud, it delivers in spades but it's also comfortable with smooth ballads. It's absolutelly the best high baffle piece that I've ever played. I play gospel/funk and I love the Isotope. It's a winner!