I have just received my third defective Jawbone headset from Amazon. The first worked great for two days then refused to take a charge. Amazon shipped me a replacement. This one worked great for one day until the microphone died in the middle of a call. All attempts to get it working again failed. Just now I opened the next replacement to find it in pieces in the box--the back cover was off and the circuitry was exposed. That couldn't be fixed either. I just got off the phone with a customer service agent in India who issued a refund but could do nothing more. I have owned a half a dozen bluetooth headsets over the past few years and had ordered this one to replace a workhorse Plantronics 510 that finally wore out. During the brief time the Jawbone worked, the noise reduction was amazing. The problem is that their quality control is simply embarrasing. I'm going to order another Plantronics 510.