Try to use Poloniex exchange they're user friendly and you can file a ticket if you have a problem with their site and you can use 2FA security to prevent from hacking or use Bittrext if you want a unique style and fast website, These 2 exchange site i've been using about a year now but the only thing i've experienced in poloniex is in withdrawal problem they are slow in approving a Withdrawal request but it is good to prevent from hijacking your bitcoins, They reviewing the withdrawal request before they approve it.