I'm also wondering about this question - never booked MU before. I'm looking at an upcoming IST-PVG trip; I would much rather fly nonstop than IST-CDG/AMS-PVG, which is what AF/KL is offering me. Unfortunately, for nonstop, MU is the only one which offers that routing if booked directly. I refuse to book 3rd-party when it comes to airlines.