The bad news ...
The update software is almost impossible to run on Windows 7.
From the second day, the headset will not turn.
When creating a customer account to the vendor's site, I can not finish creating the account (because it takes a state and a Postcode, after entering the country France has removed state fields and ZIP).
I ended up sending an email (in english) to the support, indicating in the corresponding field, I preferred to be contacted * French *.
And I just got a mail * English * support provider, located in Holland, offering me a replacement ...
Continued ... but for now, it is a real disappointment!
Update January 2013: I finally proceeded to replace it a few months ago. And since it works.