My motorola 510 died a month ago and I replaced it with a Plantronics Discovery 665 and gave my wife a new Motorola H12. People still complain that I sound terrible in the car so I picked up a Jawbone which is suppose to have the best noise reduction system of any bluetooth headset. Just paired it with my phone and will give it a try tomorrow in the car. The commerical for it was impressive. Has anyone tried a Jawbone bluetooth headset?