GRU-MEX-LAX roundtrip. GRU-MEX on B777-200 comfortable aircraft good legroom individual but limited IFE. Offered complimentary alcoholic beverages but meals were inedible. MEX-LAX on B737-700 fair legroom. Aeromexico has an odd confusing boarding procedure - instead of using boarding groups based on seat rows just like most of airlines they call passengers by seat type: window middle or aisle. That means if you are travelling with relatives or acquaintances boarding will have to be individual. If you consider connecting through Mexico City be aware that no matter the destination is you will have to go through immigration and customs. So think twice if your final destination is the US.