Usage is quite comfortable, the atria are flexible, and it fits perfectly on the head, stifling outside sounds.
Tested on an android smartphone kikatt (4.4), the sound seemed good, although acute lack depths. To get the sound that suits me, I downloaded Equalizer Free 'on android (it certainly has it better) to boost the treble a bit I miss on the style of music I listen to. Note that everyone has a different ear and the same perception of sound
If you connect the headset to the jack (flat cable), the controls do not work (logical and normal), by cons it helps out if the headset battery is empty.