My previous 'visits'. I was a US Army Captain and full of 'piss and vinegar' so didn't mind all the forays around the country. They are content. Capitalism is alive and well.
Major construction is underway everywhere.
Vietnamese 'dong' and US dollars. Credit cards are accepted at most restaurants and hotels. Not much 'black market' was visible. Vietnam Airlines is modern and efficient. The railroad got wiped out in the central region by the worse floods they have had in 100 years.