Poloniex have been around for quite a long time and you can trust this exchange for the security of your funds. The exchange is easy to use, have in my opinion a nice design and nice charts. Deposit and withdrawals delays are, in my memory, correct. The only very bad experience that I had with Poloniex is with the support : for months the support didn't answer me : yes you read it write, for MONTHS they didn't replied to my ticket. So I would recommend using Poloniex if you are not afraid of See full review