An amazingly well designed product! The sound is unparalleled, which is what I was after. The noise cancellation is fine. There are better products out there to block background noise, but the quality of audio comes nowhere close. I personally use these while I am receiving chemotherapy for roughly a 50 hour period every other week. One major plus is that the battery lasts the entire time with juice to spare. Not too many BT headphones can make that claim for continuous usage on one charge.