Quality: Sublime product quality: One notices immediately that one what has in hand. Metal bracket, luxurious fabrics. The thing holding the first impression was years ago.
Comfort: the listeners are at the beginning rather narrow, so you should wirllich little wide, or span the thing nachs somewhere, thereby beginning really very quickly arise headaches. The headset is however very light, so you I think after some time get used to the headphones.
Sound Quality: The sound quality is excellent, but I have now got used for some years to Sennheiser sound well. Compared to the open PC360 something dumpfere Soundstage is striking and the stronger bass. The bass is unfortunately so strong, that I at least unfortunately very quickly get a headache because of the bass and the closed design. Since we also know well why Sennheiser has dispensed with his headphones on these strong bass.
The voice quality was excellent, reported by some noise could not be heard.
Conclusion: if you really want to have a headset that Hifi Sound and PC world connects, you have probably the choice between the Sennheiser PC360, 350 (One, Zero) and the MMX 300. I have tested various other headphones from other manufacturers , Pretty much everything is suspended from these headphones in terms of sound quality, as long as you bring a reasonably useful soundcard. But I tend still to Sennheiser, I habs really trying, but you should really, if you are faced with the choice of "two" versions, both listening to previously. They are not really comparable.