I didn't buy it to use round the house as I prefer speakers. I bought them for flights, even though I don't fly that often! Just my old pair of noise cancelling headphones are getting old in the tooth, must be 6 or 7 years old now and still headband is a bit tight round my ears. These are more over ear than on ear so much more comfortable.
Noise cancelling wise, it's not 100%. I can still hear people talking but background noise is 99% eliminated, on the plane it removes 95% of all sounds. The other thing that this headphone really shines are it's round pad feature, the ability to play, skip, pause, next, back, volume and even Siri with touching the right side ear cup is like magic. Not to mention if you cup over the ear it plays ambient sound instead into the ear cup, it also can answer phone calls too which is very odd at first.
Sounds quality, it's good, is it better than my HD600 or Momentum? I can't tell you because
1 - I have not tried it though any lossless or uncompressed sources like a CD.
2 - I don't use headphones at home which requires point 1 above.
