NO SUPPORT STAFF FOR FLIGHT CONNECTIONS!!
Cons: The very worst thing is that I flew into Beijing 90 minutes before my next flight -- had to go through terminal transfer and a VERY LONG immigration line. In fact, I MISSED MY FLIGHT TO CHENGDU, and Air China had to book me on a later flight. The Beijing airport is cranky and difficult to smoothly get from one place to another, but missing this flight was COMPLETELY AVOIDABLE if there were ANY Air China staff around to assist and there weren't.