I bought this because I have two loud cars and people have a hard time hearing me when I use my cell phone in the car.  The noise cancelation is excellent.  My Dad couldn't tell I was driving when I called him using the jawbone.  On the other hand, I find the volume a bit low and sometimes have trouble hearing the other party.  I also spent a good bit of time bending and adjusting the earpiece to fit comfortably.  Overall I am pleased but wish it were louder.