The noise reduction feature of this headset really does work.  While the sound quality is not quite as good as using the phone directly (SLVR and RAZR V3), it is very close, even in loud environments (which, for me, generally means driving with the windows open).  Sound quality to the wearer is very good--I do not have any issues with volume level.  This is the first headset I hve owned that reliably enabled voice dialing.  Further, the battery life is exemplary (my initial concern).