Got these headphones to replace some sony earphones. They were good earphones, but the difference between the quality of those and the sennheiser headphones is incredible!
You can hear bass mid and treble very clearly and I constantly notice things in songs I couldn't hear with other headphones, they constantly surprise me with their quality.
I've used these very regularly for over 2 years, they've been constantly on the move, shoved into bags, suitcases, car boots, even had a small filing cabinet accidently dropped on them, without even a scratch or slight drop in quality.
Perfect for everyday use, and very handy on long haul flights as movies and music can be heard a lot more clearly, and they block out enough noise to help you sleep even if nothing's playing! Only complaints are that the cable can become annoying as it's very long but as mentioned in another review, they are available with cable winders, and also I have had some slight ear-ache after about 5 hours of continuous use, but the incredible sound quality and buildquality more than make up for these minor defects. Five stars, fully recommend for music, TV, flights, great value!