the noise cancellation be not as good as bose . but it cost so much less and get you most of the way there . the audio quality be passable , as people have note it be much quieter with nc turn off but nothing that the volume control on you media device will not solve . I also do not have problem with noise leakage , in a office setting with workstation whir on desk , you can not make out sound at 1 foot from the headphone . you mileage may vary with ambient sound and volume of music .