Our son had his junior semester abroad in St. Petersburg Jan-May 2013.
No issues whatsoever using our CapitalOne ATM card there, nor our CapitalOne credit card for purchases.
This included his spring break trip to Istanbul.
There were no fees from the ATMs he used, we had instructed him to use bank-owned machines, no fees from CaprialOne omn this account, and exchange rate was about .7 to .8 of 1% above daily published rates as part of the Cirrus/Plus Interbank systems..
Travel was noted with CapitalOne, and no problems with another card on the account being used here while he was there.