Absolutely fantastic mics. We hired a few for our show, and I can honestly say the clarity and natural sound to the speech was like nothing we have had before, and there was none of the "boxiness" often heard with stage headworn mics. Being that close to the mouth , resting just off the cheek and the level this allows to be picked up, gave excellent isolation from foldback systems. The only minor issue we had was on ensuring they stayed on the face. The make up department came to the rescue with elastoplast and concealer (hence only 9 scored).
These mics provide freedom for the performers (they quickly forgot they were wearing them) and the sound team (allowing us to mix the audio rather than control the feedback).