Purchased this unit for the wife for use with her (verizon) Samsung SCH 950 phone, and it works quite well, both in and out of the vehicle. She claims it is comfortable to wear...but sometimes the button for answering and other functions can be a little "tempermental". If you press the button too hard,or too long, the unit decides to go into functions other than the one you might want. Even with practice, the sensitivity can be trying at times. Otherwise, the unit works well, and as promised. I also experimented with the unit connected to my LG VX_8600, and the Samsung pairs much better than the LG.