Very stylish, pretentious and convenient device. I specially took the maximum version, so that it would look beautiful at concerts. There is a question whether it does not block some frequencies due to pressing against the soundboard, but the area of pressing is so small and close to the shell that I think it is not worth worrying about. At first, I used it constantly, then it became, sometimes, too lazy to constantly fasten and unscrew it. For short classes, I work the old-fashioned way, with a stand.
