plantronics makes the best bluetoother headsets. but like most, background noise made most unusable for me. this, and the jawbone are the only bluetooth headsets i've used that acutally block bg noise. and i have owned several different kinds. however, the volume on the 510 is much louder than the jawbone, and thus makes it a better headset in my opinion. i use it in my car and no one knows i'm driving.