I bought this one for my wife when her Plantronics earpiece broke. After using the BlueAnt for a couple of weeks, she went back to the old one, sans the earpiece. Her main complaint was it didn't fit her ear properly, my main complaint was it sounded garbled, like she was talking from a drum. Another problem is the charging system. They tell you not over-charge it - remove it after the red light goes out, around two hours. Who has time to sit around and watch for the red light to go out? I want to plug it in overnight and be ready to go the next morning.Another complaint about both units is the noise it makes from the slightest wind, including the air conditioning in the car. Does anyone make a unit that doesn't do this?