Summary: Alright so this is my first review, but ill try to just lay down the facts and keep it simple. These headphones do an amazing job of taking all outside noise away. just flipping the switch on them even without music playing, makes you feel like you entered a vacuum where all sound disappears.
Pros: Noise Cancelling, Comfortable, long term wear comfort
Cons: unusably long cord, music quality is nothing special.
Summary: Why I ever considered buying this? My office is now noisier than before, so I don’t want to crank up the volume too much with my closed phones. My office phone is now AKG K271s. While I like its balanced sound, the overall comfort is not ideal.
I demoed the QC15 at Bestbuy.
Pros: Superior active noise canceling ability, light and comfortable
Cons: filmsy cable, only play music with noise canceling on.
Summary: I purchased these because my Sennheiser PXC450 were getting too big to carry around once I purchased a larger netbook. So this review is more a comparison of it and the QC15.
The striking difference is the size - the PXC450 are just massive.
Summary: I found these for a great price used and couldn't pass them up because I am going on a long flight soon. The noise canceling in these is incredible as most have said. Any sound that drones on or rumbles or is generally steady and unpleasant goes away with the flick of a switch.
Conclusion: The best noise-canceling headphones we’ve used thus far are Sony’s more expensive MDR-NC500D ($399) model. Overall, these units have a wider dynamic range, but the QuietComfort 15 unit does a better job blocking out extraneous noise, a critical requirement for keeping your sanity while flying.