About a week ago i thought to give them a try and made a little test deposit. But not even this 1st step was working out: How I learned later, the coin was "in maintenance" and "deposits offline". Still HitBTC let me deposit and not even gave a warning about the offline status.
After the coins arrived at their given address they moved them away to another address very soon. When I opened a support ticket about this issue they came back with standard text. After requesting an update some days later, they did not respond but just closed the case. I reopened another one including all the info of the original one with the request to refund my payment and still get no answer for days now.
So even if they would do the refund eventually, it is me staying with the risk as I can not sell these coins in the meantime. So I can only warn everybody to use this exchange.
If a coin is in maintenance they shouldn't even let you have the deposit address. Why would they give you a deposit address if their wallet was offline? Though of course, you had some responsibility in not checking closely before you deposited as well.
Also, why were the coins moved if the wallet was supposedly "offline for maintenance"? I'm not sure about that. Also it's definitely not good the way they ignore to support messages and even close tickets without resolving them.
HitBTC has had a pretty shady past, hence its negative ratings on bitcointalk. There are people who complain of their accounts getting 'hacked' and random trades being placed constantly. Also, you can pay to get your coins listed for a certain amount of time with levels of marketing IIRC which means that they probably don't care about customer experience at all. All about getting the money from ICOs.