Dear Ton, I have received the thumb rest. I have used it for about two weeks. So far I am impressed. I have much less fatigue in my right hand. I just finished four 2 1/2 hour recording sessions without any right-hand fatigue! other flutists were very curious about this product. I will forward your e-mail address to them if it is OK. Again, thank you for sending this product. I will put in a good word to other flutists in the area.