I've been using these headphones for over a year, and they are still as awesome as the first day I put them on. Amazing sound quality, good noise cancellation, and simply the most comfortable headphones I have ever worn. I regularly wear them for 6+ hours in a day, and they're still not bothering me by the end. The self-adjusting headband works brilliantly, and the extra long cord is just an added bonus, so you don't have to have your input jack right next to you.
Having tried several headsets, I now opt for these headphones with a desktop microphone instead, because there's just nothing to compete with these for comfort and sound quality.