Bitstamp is one of the most popular fiat to Bitcoin exchanges. Tracing its beginnings to the first generation of exchanges, Bitstamp provides their customers with an easy to use, secure and reliable service since 2011.
Bitstamp is the first major bitcoin exchange to introduce and incorporate the industry's best security practices such as MultiSig technology for its hot-wallet, a fully insured cold-storage where over 98% customer BTC are kept off-line in secure vaults, in addition, a number of security features are available to its customers such as two-factor authentication and confirmation emails for enhanced account security.
The Exchange allows you to execute instant orders at the best bid or ask price as well as place limit orders, stop loss, and trailing stop orders. Business and individuals from all over the world can buy and sell bitcoins 24/7 through API or the Tradeview trading interface.
By using Bitstamp's mobile phone apps, available for both iOS and Android, its customers can trade bitcoins on the fly easily.
If you look for a secure and reliable exchange with good liquidity, and a robust infrastructure, then Bitstamp is your exchange of choice.