Impécable once configured, BUT ...

Product according to the expected working well.
For cons, the BT dongle is capricious.
Under seven, it is automatically installed as a "CSR Bluetooth chip" .. which is not good!
The dongle will not work with this driver EVER yet selected automatically.
An update from windows update does NOT solve the problem.
By cons, if, in Device Manager, it carries out a manual update, which is "the pilot manually search" and you select "Generic Bluetooth adapter", miracle, it is at once properly recognized and recognition of the actual keyboard can be done.