Outstanding product. Very flat frequency response. No coloring of any particular frequencies.If you need bass boost or scooped mids, just use an equalizer, they are very sensitive to equalizers.Warning : 128 kbps doesn't really justify their awesomeness.... I would recommend FLAC or at-least 320kbps mp3'sIf you use really low quality audio (like old desi movies on youtube), they are completely unforgiving.The thing that really amazed me was the sound stage... these headphones sit around your ear; as a result the "speakers" are at a distance from your ears. I guess this is why the stereo imaging is out of this world.Very comfortable bag for portablility... But i don't think these are leaving my desk for a long long time....Cons ... not very portable. I think the cable weighs more than the headphones. But if you are looking at this product, i guess it shouldn;t matter alreadyPreferably use it through a headphone amp - I use Fiio E6 - It significantly improved the audio quality when using mobile phone. Less difference noticed when using pc audio out or sound card