We have a couple of questions to ask before our trip to Hanoi in Sept.
a) What currency is normally used in Hanoi? Is it better to use Dong or USD?
b) Which taxi company should we look out for when we arrive at the airport? Any taxi counter near the airport for us get the taxi?
c) What is the expected taxi fare from NoiBai airport to Old Quarter area?
Hope someone can enlighten us on this.