Never been to Heathrow, but flown in and out of BJ Terminal 3 many times. It looks nice and modern and feels comfortable, but I and everyone I know hate traveling through it. It's so fucking huge, it takes forever to get around. And it seems to have been laid out in a way that requires extra walking / tram-riding than necessary for the amount of air traffic. I always got the impression that it was specifically designed to convey a sense of grandiosity to foreigners first coming to China: "Wow, what a modern and epically large airport, this must really be a globally important city."
