In the end it comes down to your own choice, because as @samstonehill said, it's really too difficult to trust these centralized exchanges unfortunately. This is part of the reply I gave in the comments below.

Besides the obvious large exchanges like bittrex or binance, I also use coinexchange.io So far my experience has been good with that exchange, but I'll be honest, I have come across a few complaints about slow withdrawals on coinexchange.io