Well it was pretty unsafe for US planes up until 1975, but I think its probably OK
Seriously, having just made a series of flights within Vietnam with VN
, ATC was not something that was particularly worrying to me. Now I know I don't have access as to how Vietnamese ATC works, but given that the Vietnamese are a pretty efficient bunch of peeps, one got the feeling all was as it should be. Further, neither Saigon nor Hanoi where exactly busting with traffic, even during apparent rush hours.
Further, the airspace is populated by Cathay, SIA, Lufthansa, Air France, Thai, EVA and Shanghai Airlines amongst others and one would assume they have done their homework...
...Mind you there were some pretty nifty looking Migs at HAN