have the Sennheiser headset had for some time and I can say in advance in advance: I have submitted it again.
The headset itself is beautifully designed, it is well located, not pushes and surrounds the ears. The up and down foldable microphone is stable and recognized by the voice quality and is expected as soon as one moves up there. What bothered me a bit is the volume control on the right ear, here you need some familiarization period until you intuitively know the direction in which you have to rotate to make louder and softer.
And exactly at this point exactly what it has the negative part of the review, when adjusting the volume creates a balance - imbalance that sometimes settles immediately and sometimes not. I've read other comments that such a thing had occurred and it seems easy to be a serial fault.
Apart from the volume control I liked not very good (in 7.1 mode) of the sound. Granted highs and mids were very good, in compensation to the depths were respectively the "Bass" if one may they nenen as much too weak and indistinct. This I found very disappointing especially when playing BF3 or music listening needs. The explosions were in the surround mode rather poor to unpleasant and that has to be changed again from surround to stereo has not changed. Was I also found that the location of enemy vehicles or in stereo mode shown much better than in the surround mode, in which just the sound somehow everywhere came and also consulted than it actually was. Since this I see a 7.1 headset is the best will not one that I have better experience in stereo mode, especially not at the price.