"Good product/gets the job done - not the best sounding"4.0 starson by gsuen
Pros: I use these primarily at work and while traveling by air. They greatly reduce the fatigue caused by the droning (white noise?) of flying. Pretty comfortable, over the ear (not on the ear).
Cons: I own a lot of headphones including Grado SR-60, Sennheiser HD580, and Sennheiser ER-6i. These don't sound as good as any of these and don't give the sound isolation of the ER-6i.
Summary: I thnk these headphones and the Panasonic RP-HC500 are virtually identical. I did not have both at the same time. The Panasonics chirped when my hand went near the noise cancellation microphone and the ATs did not. I recall that I thought the Panasonics sounded more clear and because of that I upped the volume which in turn isolated me further from the outside. It's possible that the drivers are different in the headphones but I'm sure both companies source from the same noise cancellation supplier.
The headphones come with a nice case and all the accessories needed for travel. Battery life was good. I didn't need to change the batteries as I flew cross country and used them while waiting for my much delayed flights at the airport. I recommend these for the reasons above and though I gave away the Panasonic set, I might go with the Panasonic head phones even if the cost is a little more and would need to learn how to not make them chirp.