Bitstamp is a Luxemburg cryptocurrency exchange and it is regulated by EU legislation. It supports a small number of cryptocurrencies (Bitcoin, Ethereum, Ripple, Litecoin) and it is possible to trade them against USD and EUR. Previously it was hacked and now it claims that %98 of available funds are kept in cold storage. The advantage of this exchange lies in the variety of accepted payment methods. You can pay with cryptocurrencies, via credit/debit cards or bank transfers. For European residents, bank transfers can be performed via SEPA system. Speaking about trading interface, Bitstamp platform helps its users to compare prices of supported digital/fiat assets and to make decision based on well-exposed charts.