Together with a handful of other mouthpieces, I tried the Gottsu Bebop mouthpiece on my vintage Buescher True Tone and I must say that I was very impressed by every single aspect of this mouth piece.
Opposed to all the other mouthpieces that I have tried, Gottsu offers a great control, while also being very free blowing and allowing a wide articulation of the tones. It makes all tone feel, full and rich across the entire register of the saxophone, without producing any sharp notes.
There are many free-blowing mouthpieces available, but non of them offers the versatility and expressiveness in tonal articulation of Gottsu. In short, Gottsu combines qualities of a mouth piece that should not be possible, and therefore I can only recommend this mouth piece to anyone looking for a versatile and expressive mouthpiece.