In Ecuador's currency is the US dollar.
It should come to Ecuador and Montanita with dollars directly.
Prices are relatively cheaper than many other countries in South America.
In Montanita there is currently no places where you can change Euros and travelers checks, so it is not convenient to come with that kind of exchange.
For those who want to change Euros or other we recommend you do directly in Quito and / or Guayaquil corresponding exchange agencies.