I think both bittrex or binance are good. I used both but in my opinion I prefer binace more because it is very easy to use and suitable for trade newbies.
I never used this Bittrex but I do know this is amazing for everyone. Reviews tell us big story about the real thing. They said, this is quite impressive for those who are newbies. When someone gets in this world for the first time, he is quite confused and sensitive about what would happen and what are best legit exchanges. So here we are presenting best exchange for you.