Bose Quiet Comfort 15

Pros: The exterior sound dampening is excellent, like going into a black hole, nice carrying case.

Cons: I have had 4 sets of these headphones, one set couldn't play high notes, so much for quality control, on 2 sets they broke on the headband and the last on the thin plastic cup yokes, so good sound but very poor build quality.

Summary: The broken parts could easily be repaired with cheap spare parts by replacing the yokes, but, amazingly, Bose don't do spare parts, I was offered a trade in at £150, considering I have not managed to have a satisfactory set for longer than a year, I think not.
Excellent sound quality and battery life, awful standard of build strength, these are supposed to be used by travellers and should have more strength built into them. The should keep a stock spare parts for these easily broken items. At well in excess of £240 a pair most definitely not worth the money.