Positives:
+ Good coverage on one floor and an outer wall still 15-20 meters
+ Battery life is sufficient for me for several hours (is now less)
+ Have a moment during the operation possible (then stop cable on the device)
+ Sound quality is ok
+ Recording quality is very good (voice in voice chat and Skype)
+ Plug & Play, no additional drivers needed. Control problems directly via Windows.
Negatives:
- The USB cable is very short. Difficult to charge during operation (goes practically only on the notebook)
- Sitting too close to the head. Hurts even after several hours of use
Conclusion: Buy recommendation for all who do not have thick head;)