Read before ordering!

For the actual headset I can not say anything because Amazon me repeatedly delivered another article.
However, I can only advise interested customers the headset through this platform to order - the fault has namely method:
When picking the goods, the right bar code is obviously fall on the wrong product. Until this error someone noticed, the customer gets therefore useless headphones from HTC, instead of the desired Sony product ...
If you buy the device instead at a shop, you save unnecessary trips to the post office. ;-)

Greetings from Berlin.

Update: Meanwhile, I've me the Sony headset purchased at the store - and returned. Here the evaluation.
Note the test environment: I tested the headset with a high-quality Samsung media player with uncompressed .flac files and on a Nokia 5630 with .mp3 files. The speakerphone and the answer very well fold. The intelligibility is very neat on both sides!

Processing: Well done. Cable, phone and micro should hold for a while. Unfortunately, the cable is split asymmetrically - for me a KO criterion. Otherwise it might like.
Sound: To me a very clear thing - the device is not worth the 40EUR RRP! As a headset for making calls, it may be the average requirements, but for more intensive use of the music part is unsuitable. Everything sounds very compressed, ie spatiality is almost entirely absent. In addition, the detail resolution is deficient. Bass I could not find despite good fit in the ear.
The advantage of this "tuning": they can be very long and relaxed listening to music - the centers come across well. Up and down "interfere" nothing. The speech intelligibility is thus very naturally served.

Conclusion: good headset for making calls, but with 40EUR too expensive (in the store). 25EUR are ok if you hardly want to listen to music with it.
For sound, there are 2 out of 5 stars from me. A (good average) Sennheiser CX300 sounds better in all situations and would get 3 out of 5.