The build quality of the actual headset is not outdone, it seems solid and well finished, including at the level of the supplied cables (standard, these are replaceable in case of damage) but it proves more comfortable to wear with good content weight, especially compared to other headsets. We probably would have become even more comfortable with larger headphones, but it is perceptible only when listening long.
On the audio side, this headset gives the bass boost, and therefore is not necessarily suitable for listening to all types of music. But be reassured, the manufacturer has not fallen in excess of certain brands which have only low ... the result is very satisfactory, particularly for mobile use (shame however that the headphones do not fold as the M-100) The proposed intermediate insulation, other helmets isolate much more. in addition, no active noise reduction system is built.
The current rate is really content to headphones of this quality.