CO is one of my new employer's preferred carriers and I've had good experiences so far on about half a dozen North American and trans-Atlantic trips. Because I moved to NYC from Paris, I had been accumulating FB miles for my CO flights. However, I'm pleased about CO's move to Star* because my long-time co-primary FFP has been Aeroplan, so now I can accumulate Aeroplan miles and status on my CO flights. In the next year, I'm planning to burn my FB miles and especially by BAEC miles because I'm fed up with BA's seating policy and its outrageous fees for reward flights.