I first owned the QC2 since 2005, then upgraded to QC15 for £120 2 years ago when battery leaked into my QC2.
I fully agree with the review:
http://www.whathifi.com/review/bose-quietcomfort-15
I'm not surprised that it won the best buy award 3 years running.
I tried the Grado SR325is which was brilliant as well, but I did not find the Bose to be inferior at all. The noise cancellation feature won for me. Of course we all have our opinions, but the Bose is definitely not a poor listen.