I think, Binance is very good as they provide 0.1% fee. I keep binance acc, coinbase acc and recently got a freewallet acc cause they are really working hard to keep low fees and do btc transactions quite fast and cheep
I have heard about this exchanger as well, a Chinese one, new one. People are saying that fees are really good there as for withdrawing. But China is not the most stable face for crypto currencies and everything about it you know. And I have fear to their exchangers, cause of every day the government can make a new "something" and the exchanger will be closed. I use YoBit where fee is 0,2% which is also not so big.