Bought this for my wife to use when talking on her IPhone. People had a hard time understanding her because the IPhone case partially blocked the microphone. Now we can all hear her fine. She said it's comfortable, and it also allows her to go hands free. Good product.
Great set of phones, we use them for each of our calling groups (support, success, and sales) and everyone who uses them refuses to swap them for a different set. The sound quality is great, they actually reduce the background noise so the caller on the other end can't hear other office noise. Really great quality.