I've flown MU from LAX to PEK vis PVG and had really mixed results. The flight out was half empty and I had a lot of room to sprawl out and relax. The cabin was spartan and I don't know that it was super clean. The flights back were full and I had screaming children behind me (not MU's fault). It was certainly not a glamorous experience, but all my flights were on time and it was by far the least expensive option. I would probably fly them again for the right price.