In any aspects of issues in the exchange particularly in transaction in withdrawal, I most often heard issues about this HitBTC, and sometimes I heard also the transaction fee of charge was also high. But in my experience, though it is very seldom for me to use it, I never experience nor encounter those what they are saying about it. All I know is that if you made a transaction in every exchange within 48 hours if it is not transferit will go back to your wallet unless you put the wrong address wallet it will never recover.