I have tried many headsets and found this unit to have the best sound quality and it's the most comfortable. Out of all the headsets I have used I have not had to call tech support because they worked perfect out of the box. The Logitech unit I received did not support voice dial even though a few reviewes claimed it did. I called Logitech to find out what was wrong with my unit and dealt with one incompetent person after another. The people that answer the phone at Logitech can not spell Bluetooth and have no clue on what it is used for. Logitech does not have an 800 number for support and I spent two hours working my way up there support chain until I found a person that understood what Bluetooth was. He told me all units in the field have old firmware and my brand new unit needed to be shipped back for a replacement. I sent my unit back next day air and it took them over a week before they shipped me a replacement. I WILL NEVER BUY ANOTHER LOGITECH PRODUCT EVER.Sean