The sound is good, much better than the original headphones, with the added benefit of in-ear in terms of insulation. But these headphones are too fragile, barely received one of the cords pose a problem of poor contact and the left ear running intermittently. Damage with a sound as good not enjoy in one ear, especially at a price that is still no entry! I'll fall back on a cheaper model, even change often. This model is very disappointing, I do not want to take too cheap model and thought Sennheiser was a safe bet, but then I just feel like I have done.