If you can get coins from other reputed exchanges then it is better to avoid Hitbtc because support is not good if you face any issues. I didn't trade on this platform for quite some time due to these issues like withdrawals delay, high altcoin withdrawal fees and suddenly coins disappear from your wallet. If no other choice then you can try your luck but don't deposit a big amount.
I heard similar things. HitBTC customer services are reported to be not very good either.
Just don't use it as a wallet for the storage of your coins and you'll be fine. I do regularly use HitBTC for buying a few alts (not trading), and never face any issue(s); deposit, buy your coin, and withdraw it; it's a bit risky to sleep while your funds are in HitBTC's database, so don't do it and you should be fine.