The huge negative side, is their constant changes to security making harder and harder to use.You need password, google authentificator, 3 personal questions, email confirmation, and now a new security code 6 digits pass...OMGAfter you log in , you need to enter again google authentificator number, in order to be able to trade.... that is so stupid sorryWhen you withdraw , you must complete 4 layes of security. Chances are to emprison your crypto with their security .No way to work like this kukoin ! bye