Frommer's lists exact prices in the local currency. However, rates fluctuate, so before departing, consult a currency exchange website such as www.oanda.com/convert/classic to check up-to-the-minute rates.
It's always advisable to bring money in a variety of forms on a vacation: a mix of cash, credit cards, and traveler's checks -- although lots of businesses no longer know how to handle traveler's checks and so won't accept them.
You should also exchange enough petty cash to cover airport incidentals, tipping, and transportation to your hotel before you leave home, or withdraw money upon arrival at an airport ATM.
ATMs are everywhere, even in convenience stores on street corners. Credit and debit cards are accepted almost everywhere. Checks are frowned upon, especially when they aren't local.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.