I bought these for drummers to use when I'm recording.
Good points: Noise cancellation is fantastic - almost as good as the industrial ear defenders I have lying around. They're really tight fitting too, which means moving about isn't an issue either. Despite that, they're still pretty comfortable too - you can wear them for a full day without any major issues.
Bad points: They don't sound great. They're really lacking in high-end, which does mean they don't get too fatiguing, but it means getting enough cymbals in them for drummers can be difficult. I *hate* curly cables, they're just a pain, and it's annoyingly short. I've had them for about 3 years, and a couple of bits of (unnecessary) plastic have fallen off the headband - they still work perfectly though.
Over all, not too bad. If your priority is cutting out background noise or reducing headphone bleed into close mics, they're great - just don't expect stellar sound quality.
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