Let's start with the quality of the headphone itself to: The materials are high quality and very well made. Even the plastic used sparingly on the outside of the ear cups a quality image and elegant. All in all looks the headphones from wertig what it shows on its own weight.
The sound quality is, as one would expect at Harman Kardon, really excellent, which (when turning it) is accompanied by especially noise-canceling! The frequency range of 16 Hz to 20,000 Hz is really audible and superb especially in the depths. You can hear sounds that you previously could not perceive. The highs are really implemented sound great and listening to music is a pleasure!
With regard to comfort, there is also nothing to complain about! The soft padding on the headphones are comfortable and even with extended wear nothing is unpleasant!
Conclusion:
A really great headphones, which is worth every penny!