I have a problem with the Bose QuietComforts... I tried them on and the noise is deffiantely cancelled out, but two things suck about them. Firstly, at least my own experience, the noise-cancelling function gives a penetrating high-pitched tone, which you can't really hear, but it feels like you're in a plane that's lifting off or getting ready to land, like a deffinate difference in air pressure, which I found to be very uncomfortable. Secondly, something I still believe is very stupid by Bose, is that if the batteries in the headphones are dead (needed to charge the noise-cancellation), the headphones won't work at all. Not even with the function turned off.
I bought the On-ear headphones from Bose, which have basically the same form as the noise-cancelling ones, but are half the price and have the same fidelity as the QuietComforts. Moreover, because these headphones are placed ON the ear, it automatically blocks out alot of noise; when I'm on the train for instance, I only hear music and nothing else, I used them only once in the plane, and I thoroughly enjoyed them there too.
My two cents. But those cents are Euro cents.
