Most reliable exchange in Europe is bitcoin.de . It's very secure, customers are very satisfied for nearly three years - no hacks, no un-announced pauses, no delayed withdrawls. bitcoin.de is compliant with german law, the ceo is well known in the bitcoin-scene and beyond as a founder and businessmen, bitcoin.de persuaded the fidor bank to cooperate with bitcoin-companies, the support is famous to be fast - so yes, there is at least one really reliable exchange already.