I traveled on CO BF for three years and while it is a very nice service I think AF F is much superior. Just returned from an AF F roundtrip to Paris. On the first sector SFO-CDG in particular, the service was exemplary, very attentive with lovely food and wine. I had Fois Gras de Canard followed by a Fillet D'Agneau. Then, a nice sleep in the old lie flat seats. To be recommended.