Perhaps I'm too sensitive to sound because I'd been doing audio engineering so I've trained myself to hear details in depth, but they've changed my life in a way I could not imagine. I now consider them essential to my well-being and take them everywhere. I call the little power switch, the 'shut up' switch. Put them on - click - and the world shuts up.

Moreover, the audio quality is /amazing/. You can be city center and listen to low volume classical, crisp and clear. You literally put your ears in a /studio/ while the rest of you is somewhere else. Just magic. They use a battery(but it lasts for weeks on occasional use) and the cord is detachable, so you can use them just to block sound and walk around. Be careful though not to be stepped over by a car because you don't hear them coming. There's a tiny mid-high window still passing through so you can still speak and hear what people say, even clearer than before, since the rest of the environmental noise doesn't mask their voice, which is mostly in those frequencies. Highly recommended.