Selmer mouthpieces are a standard for saxophone mouthpieces and are highly regarded. The S90 is easy to play and produces a beautiful tone, making it suitable for various genres. It's widely used by players of all levels, from beginners to advanced players. The chamber is slightly large, designed for good resonance. It's also the model included with Selmer saxophones. The Selmer S80 and S90 series are fundamental when discussing mouthpieces. I've used this for about two years. Please be aware if you are sensitive to wear and tear. It has some sun discoloration, but it's a very good piece. I selected it from a batch of 15. I will clean it thoroughly before shipping.