Similar to Thailand in some respects, housing, plan on $1500, tuition for intl. schools $800-1000 per kid. Food is great here, very healthy and safe cuisine, large western style grocery stores available. Lot's of historical sites, Vietnam is very beautiful, many areas completely untouched by tourists, people are very friendly and helpful to foreigners, even though Hochiminh is 8 million plus, safe to walk anywhere in the city at all hours.
On the negative, air pollution and traffic is bad in the city, infrastructure badly lacking, housing prices going off the chart, construction noise everywhere, driving conditions treacherous as law enforcement (and driver education) is non-existent.
On the line, aircraft are well maintained (IMO) and bad weather is very infrequent, mostly day flying on the small bus, standard Airbus SOP and friendly flight attendants.
Cheers,D.L.