Binance has been having some issues of late. Recently I had a trade that was executed but it was not updated in the balances page. Today the performance has been slow for some time. But now it shows a 500 error and the site is not usable at all.
I addition to having a better collection of coins I like the concept of Kucoin Bonus and Invitation bonus. I will be making a detailed post about Kucoin shortly.