If you play any whistle, and you want to convert a Boehm flute into a fully chromatic version of a whistle, then this product is for you because the raspy/breathy/airy timbre of a whistle is preserved.
If you want to use a recorder/whistle-like mouthpiece to simplify your flute playing BUT you do not want to change your flute’s timbre to something raspy/breathy/airy, then this product is NOT for you.
As a flutist, my search continues for a product that will affordably simplify Boehm flute sound production and ergonomics without altering the instrument’s overall timbre.