I've had the X11's for about a year and a half. I've really enjoyed them although I've had to send them back twice already. First time the mic just stopped working out of the blue, and second just like WIFlyer the little swivel piece broke. When I was instructing I got about 40-50 hours with duracell's. In the Q400 I don't even use the noise cancelling and they work fine. Haven't tried the Bose but when the DC's work I love them.