a lot of wind noises (when I was walking) and the "uni-directional" microphone that it had picked up noises directly in front of me. As in, if I rustled through papers in my backpack or did something in front of me, the person would hear rustling and crap, and NOT my voice.
Tested out a HS820 ( thats the motorola headsets that fagg0ts at the gym love to wear) and worked out decently, but wanted feedback from people who might have had the same problem I did.