Hi Cheeks
Personally I would not use a card as the charges are very high. However, I had to buy some items here recently on the debit card and the total cost was £47 in charges.
broke my heart when I saw that on the statement. Total rip off.
You might be better getting the Euro at the post office in the UK after your holiday there. But of course this means you would have to bring extra funds. I really don't like carrying money but there are a lot of places here in Silistra that do not take the debit card. The big shops and some hotels do.
Good luck with your travels have a great time