Exmo

Fast deposits and withdrawals - Funds will be credited to your account right after making a deposit.  Withdrawals are quick and are executed automatically.

Security - SSL, 2 factor authentication, Trusted IP, Encrypted system in cold wallets.

User-Friendly - Interface Straight-forward interface allows you to easily and comfortably work from your wallet, to trade, exchange, make transactions, and store your cryptocurrency.

They claim to have the lowest fees on the market.