I have flown AF A380 albeit LHR-PAR-LHR in J. As far as catering is concerned what it would be like long haul I don’t know. The service was good.
Its a great plane, quite, but what lets AF down is the J seat. It is not a flat bed. For a trip say PAR-NYC during the day it would be great, like a nice large leather armchair, but returning overnight, no thanks.