Bose is well known for the quality of their hi-end headphones. The QuietComfort 25 are one of them : excellent noise cancelling headphones. The QC25 is the successor of the QC15, one of the best noise cancelling headphones.
If you are wondering if Bose did better with the QC25, yes they did ! They corrected the few little drawbacks of the QC15 and improved the sound quality and the noise cancelling feature.