Same here: in case MU-flights were not creditted automatically, there was no problem to retro-claim from Flying Blue.
But credit, at least for Inner-China flights is a bit lower than expected.
MU is not yet on the level of other Asian carriers, but improved very fast lately and onboard service can be compared to European Skyteam carriers. The cabin crew is still a bit unflexible if you request something outside their regular routine.