My daughter was in her school’s production of “Brigadoon.” One of the cast members was a young man who is heavily into historic re-enactment and had one of the “cheapie” whistles that he used to play a dirge that he made up during the funeral scene in the play. Since then, we have been fortunate enough to receive a couple of high whistles made by John Sindt. I was taking the kids to school and we ran into the young man from the play. We showed him John’s whistles and he flipped.
He asked if he could try one out and, of course, we told him “sure.” (After all, “spit swapping” is part of the WhOA syndrome ..) 
So he tootled away for a few minutes.
I wish that you could have seen the look on his face. 
“It’s soo smooth! It’s so easy to play! And NO SQUEEKS!”
What really flipped him out was the flawless transition between octaves.
Now he’s dieing to order one. We told him it might take four or five months and his response was “NO PROBLEM!”
We’re really blessed right now to have some GREAT whistle makers and (since the dollar has collapsed vs other currencies), we are even MORE fortunate to have whistle makers in America that are as great to work with as John.
We would LOVE to try out an Overton or a Copeland (or a Burke or well… you know 
) (And to carry them all in one of Annie’s rolls…sigh) But for the money, I can’t recommend John’s work highly enough. To have such great quality and workmanship for less than a hundred bucks is incredible.