This is my 1st BT headset.. a good product. It works well with my Razr V3 phone. I'm a little hard of hearing so the loud volume of this unit is great. Comfort is fine for hours long wearing.Most corded models either sounded bad to me or the other party, this model sounds fine on both ends. Noise reduction works well with the windows rolled down driving on the highway.The only reason it didn't get a '5' is because it takes too long to put on my ear.. though I specifically chose this style since it won't fall off easily and is comfortable to wear, even with glasses.