Yes I am the one with the mpc and yes I have tried it! - it's fine. However a more experienced player than me would probably detect its qualities in a way I wouldn't...
Just wanted to check I wasn't in possession of the fabled crystal mouthpiece of Lung Chin Den, presumed lost in the early 13th century in what was then Upper Lauritania- a full 700 years before the saxophone was rediscovered by Mr Sax. I am sure you have heard tell of it.
And yes, definitely glass.
What I am using mouthpiece-wise will be the subject of a different post, once I have satisfied myself that I am not deluded or tone deaf.