Appreciate the discussion on this thread.

Have gotten the offer as well for an upcoming trip:

£69 - LHR-DUS
£69 - DUS-LHR

Flight length is about 1 hour, 20 min.
Both are evening flights.

Looking thru BA's list of what the ugprade includes, for me as a OW-E, I already have most of the bene's (lounge access, etc.) . I earn on AA, and it's a 25% mileage bonus (of a whopping 500 mile flight).

I've already got exit rows both directions on the A-319/A-320.
I've flown in CE before, and dont' see a massive difference between an exit row seat and a CE seat.