I wasn't charged any fees when I used my credit union ATM/Debit/Credit card in Europe. ATM withdraws were converted at the days currency exchange, and charges worked the same. The card my bank gives me carries a Visa logo, not sure if that has anything to do with it or not. I tend more to believe it's the general nature of the credit union though, since they also do things like reimburse ATM fees to make up for the lack of credit union ATM machines.