The sound of this headset is excellent, as advertised. The trouble is in getting it to stay in place when I move around. I'm not talking about playing tennis here, I'm talking about driving the car, and having the boom slowly swing downwards away from my mouth. The ear plug stays in place, and I can still hear, but the boom swings downward from in front of my mouth (pulled by gravity) and then the person I'm talking with can't hear me so well. The only thing that works for me in this regard is Plantronics, the one the hooks behind your ear lobe, but that one is not noise-canceling, so I can't hear as well when the wind noise gets high in the car. The ones that hook over my ear hurt me, and the ones that just plug into my ear usually fall out. This one is better in that it stays in my ear, but having the boom pivot away from my mouth is a real problem. I tried bending it so it hangs down from my ear and then swings forward to my mouth, but the center of gravity still tries to swing to the lowest point, so I'd not a boom twice as long as this for that plan to really work.