I bought the jawbone for the noise cancellation feature. I work in a machine shop where there is a lot of noisy equipment running. Without the jawbone on I have to run for my office and close the door every time my phone rings but with the jawbone, I have no trouble hearing the caller and they can't hear the noise at all!! I can stand right next to a running air compressor and the person on the other end can't hear it. I'm very impressed with this product. Getting the headset to fit your ear is not the easiest thing to do though. I picked the earhoop/earbud combination that worked best and then had to bend the earhoop many times making small adjustments till I got it to fit securely and comfortably. You have to make sure to adjust it so the little sensor is in contact with your jawbone. Once the adjustments are made, the headset is very comfortable. I often forget I have it on.