The headset has a very reasonable sound for its size. The efficiency is good, even on mobile devices. Of course he can not compete with my big headphones from AKG and Bose, but that's not the goal. I bought it because * I was not satisfied with the sound of the headphone series of Galaxy S3. The Sennheiser headphones is much better! * I wanted a compact headset. My cup Headphones simply need too much space. * The MM70 can also be used to make phone calls (handsfree) and also an operator of mobile phones using the controls on the headphones allowed (loud / quiet and Pause) * The price was in the frame.
The comfort is good. The headset blocks outside noise very well what is good (you will not be disturbed) or bad (you hear nothing from the outside world, eg in traffic or while jogging) can be.
