I fell for the simple bait of the cheapest quoted price on a flight with Fly Vietnam. After booking I was told my booking was confirmed but then heard from the airline that it was not. Meantime my credit card was charged twice: two different amounts which cheapo air claim equal the total originally quoted. But this is unclear given changing exchange rates, plus reasonably enough my bank charged two fees for two transactions. At the time of writing my fingers are crossed that my booking will be honoured when I pitch up at the airport in July. To sum up, the process of booking with cheapo air is neither transparent nor inspiring of confidence. In future I will avoid them.