At the moment I prefer and trust Bittrex, Huoby and Binance. However, these exchangers are centralized and have their advantages and disadvantages. I think in the future there will be such a hybrid exchange which will be the same good attitude.
I think same - Bittrex, Binance and Huobi. I see Poloniex try to change own position but today nothing new. Other exchanges I don't like because too many bots. Bibox and Okex has not bad interfaces but ... Binance today better 