Exchange rate at the airport is half that at one of the huge markets in Yangon so there's no point in changing to local currency as you are no longer compelled to. US currency is welcomed and five bucks will get you into Yangon and the taxi driver will be your friend for life. "As rough as a Rangoon taxi' is a throw-away line you can use on your return to the "real world". If you want to go up-country to Bagan or Mandalay you might as well pay retail at one of the airline counters at airport. All internal flights seem to cost around $100 one-way give or take. The airport's a tip and it's important to check the time of your connecting flight to avoid being stuck there for an extended period. The air-conditioning system seems to be fighting a losing battle with the temperature and humidity. The airport and indeed the country are third world but the people are nice so you feel everyone’s in the same boat. A western or Japanese woman will full of complaints “too hot too dirty too third world smells bad” as well as hanging on your gun arm. But don’t think you are going to pick up some local company. You go in alone you are likely to stay that way. Myanmar's are far nicer and less bent and violent than Thais so a misunderstanding with a taxi driver is unlikely to end in unpleasantness. The notion of boycotting Myanmar is somewhat misguided as contact with western visitors is more likely to bring about change than isolation.