Hotbit.io is a great exchange for trading alts. They got new coins listed all the time. Just becarefull selling because the sell price is way above market prices. Even the exchange coin htb is goin to sky rocket. People will be trading this platform. It's so easy.
I have sell some coins there before and it was really good. I think it is one of the best exchange platforms if you really want to trade altcoins. However, I think there still need to do alot in terms of customers services and page loading. If we really want to makes some good trade in altcoins i think there have good price.