my experience and thoughts;
hitbtc is a preferred coin exchange site due to the excess of sub-coins, but !!
I used it for a very long time and did not have any problems. But I have to mention that when I used Ethereum, it was trading around 100 USD, so I was an old user. I haven't used it recently, I haven't even logged in to my account, but as far as I saw from the forum, there were people who had trouble. I do not recommend you to trade with a serious amount, it will be the healthiest to trade on this exchange with an amount that will not upset you.
and the coin you send to Hitbtc will immediately be credited to your account, but once you send it to your wallet, it will take quite a while. For example, I sent Playkey to my wallet four hours ago, it still isn't there. Another downside is that it gets high commissions. If you can afford these situations, you won't have any other problems.