Seduced by the price for a brand product, I gave it a shot. I'm not disappointed. I bought these headphones after reading many reviews (and thus knowingly). To enjoy listening, do not move. I bought it for a static listening, AC is great. Otherwise, it actually means the son of friction against ... everything! It's still crazy as cheap earbuds do not produce this phenomenon, or very little, compared to the branded headphones!
Otherwise, the sound is still very good for a headset of this price range, the bass are not too present, but it lacks a bit of balance.
I like it anyway. Sennheiser should review the insulation of cables, it is the least we can do, at least for the brand.