I've had this for 2 years now and am pleased with quality, durability, and reliability. It is surprisingly comfortable considering the girth of the piece that goes over and behind the ear. My past headsets with earloops were horribly painful after a very short time, this one I can wear for hours, barely noticing it. It came with 3 different earpieces - one small, one large, and one teardrop shaped - so fit was not a problem. Sound quality is good enough that people frequently comment on how clear I sound and I am nearly always using it in the car. Wind cancellation really is insufficient, but this has not been a major issue for me...I just use it with the windows up or mostly up. I frequently leave this thing on overnight and still use it for a couple of days afterwards with no loss of power. Talk time is at least the 6 hours claimed and stand-by time can be measured in days.  Some people are troubled by the proprietary power cord, but it's a small matter as I have a household-type plug in my car and charge it while driving if need be, though it cannot be charged and used simultaneously.  I came here to see if I wanted to upgrade to another Plantronics model and pass this headset on to my daughter, but I think I'm going to keep it and buy her the same model.