I can say that Binance is the king for me but still all of those exchange have their own flaws. It really depends on your experience, what exchange provides you better service than others. As I remember binance has an issue before even if it was sonehow leading. They are being hacked by someone on the year 2016 i guess and a lot of money are lost. However, its founder was professional enough to handle the situation and was transparent on what happen so I believe that Binance was the number one for me.