Some caveats: In one noisy environment (a mall food court), the self-adjusting volume feature overcompensated a bit, and the volume in my ear got a little loud. Also, not so much a caveat but a warning -- the headset is very comfortable on the ear, so you have to remember to take it off if it's raining outside, as the device is not weather-proof.

Grade: 5 stars (out of five).