I?m very happy with these headphones. I already own the HD6XX and a Sony bluetooth, I bought this to have a decent wired closed back headphones, that are suitable for mobility. The sound signature is flat, neutral, with a bass little kick, like a modern warmth to them. Not so detailed as HD6XX, but easy to drive with any phone or ipod, much smaller. More comfortable than expected even though they are on-ear. You can easily get alternative earpads to make them more comfy, as well as copper cables to improve sound, have a better connector for phones with case, and a copper wire instead of steel. Having all spares available makes a big difference. All in all, very happy with them.