I'm currently trading at binance dashboard is user-friendly and can able to withdraw up to 2btc even account is unverified. I love doing trading to those exchange because their are so many tools that are readily available to guide you in decision making.
Binance is the biggest exchange now, but the biggest doesn`t necessary means that it`s the best. The best depends from many things, and with so many exchanges around I think it`s very hard to find the best one. I changed so many exchanges in 3 years. currently the best one for me is kucoin, they had great summer with so many promotions, giveaways, and I like them because of all that. New exchanges tend to offer many promotions to attract traders, like new casino. it`s the same. I support little ones with good pairs and awesome promotions. It`s not hard to find one, now so many new decentralized exchanges exist, so choosing the best is individual decision. I didn`t stop using bitfinex, poloniex, I am active on binance too, and many others. Where I find most suitable pair for me I go there.