I fear for my connection BT Handsfree my Pioneer, but the great surprise is I automatically keeps both active BT connections. The free hand included in my Pioneer AND BT A2DP connection. So it's really comfortable.
The NFC feature is ultimately not so in my case, since switching on the ignition of the car, my androphone automatically connects to the case.
About the NFC, I find the description of the production is not very clear because I understood that I would have two separate NFC tags. In made after contact with the seller (serious incidentally) NFC tags are included IN the anti-slip mats provided. Why not ...
For sound quality, I think it is quite satisfactory. Especially in a car. So RàS.
To conclude, this is the kind of small gadget that is really useful and simple. Impeccable.