You will get 30Kg luggage on economy flights as BA Silver (booked with Avios through BA but bearing FJ flight no), no hassle FJ lounge access (+1 guest) in NAN and reduced price (USD 7) for exit seat choice on FJ. My wife and I made 2 trips each in August of this year and this was our experience. We flew MEL-NAN and NAN-BNE, all booked through BA reward flights. Loved flying FJ.