For professional reasons, I call a lot of (sometimes several hours a day) and use to this headset. The sound is fantastic. My interlocutor come across crystal clear and after consultation with my colleagues, the microphone quality is very good. The headset is also suitable also excellent for listening to music. The sound is obviously not high-end, but for normal listening to music via your PC or MP3 player langts all - and sounds better than the scrap, which is usually the devices now so settled as headphones definitely worlds.
The comfort is also very good. I was a bit skeptical as eyeglass wearers whether an on-ear headset is not uncomfortable here, but after 2 hours of continuous teleconference expresses nothing. Exterior noise is well damped, so that even in the office with several colleagues can be phoned easily without you knowing too much background noise. The microphone can be turned away for pure music listening up - the mechanism for making a solid and stable impression. A thoroughly enjoyable headset and an unconditional recommendation from me. The money is well spent.