I just got this headset from Best Buy. I paid a little extra there because of the counterfeit scare in the online world! However, I just love the sound. Specially the bass. Most of the ear-bud style headphones suck at reproducing bass. My T-Mobile MDA has paired up perfectly. The A2DP and the volume/play/pause/mute work like charm. I would give it a 5 star but it's a little bulky for the gym. The cloth interior of the speakers will not stand the sweat for long. The shocks at the treadmill are yet to be tried out.