I bought the first version of this neckpiece and absolutely loved it. When I bought the new version, I was deeply disappointed with it's new design.
I play the alto, tenor and Eb clarinet, and I found it uncomfortable with each and every one of these instruments.
The middle piece where the string comes out sticks out a lot, which makes the instrument stick out at an angle from the body pointing slightly upwards, whereas it with the previous version would hang so the mouthpiece meets your mouth perfectly.
For the alto, the design forces the neck away from you so you have to make a conscious effort to keep it close to you and in your mouth. Thus creates unnecessary tension in your hands when playing and slows you down.
With the Eb clarinet, the angle of the string collides with your thumb and is in the way of your playing.
Same goes for the tenor.
I will return this as it does not meet my expectations, impossible to use with comfort and slows down and hinders my playing.