I bought this adapter for the last trip to China and Korea, and I am still using it as it still works good. Click here to buy the one I got. Please just buy one and bring your power strap. That'll work :-)   

Also, Kiera was talking about this McDonal's Big Mac price charts by country. Click here to check out the chart. If you know the price for the fast food in the country, you can guess how much you would spend for your typical meals for your down days.