When my niece started playing the clarinet she had an instrument in a terrible condition. So i decided to give her at least a new Mouthpiece so she did not have to use old, dirty, worn out one.
After I talked to her teacher we decided to order the Yamaha Mouthpiece Clarinet M3D to give it a try.
This Mouthpiece is a pretty cheap one concerning the price but it does what it is supposed to do. To be honest there are better mouthpieces but to get a real boost in quality and handling you have to pay a lot more.
To put it in a nutshell: the Yamaha M3D is like almost all Yamaha products very well produced. I would recommend it for every beginner and for advanced learners.
Please note that it is for german cut clarinets.