I can only confirm the issues with this exchange. Most of the deposits are delayed up to several days. I still have deposits of different coins the are stuck with 17 confirmation for more than 3 weeks.
Support does not answer the tickets (oldest one is more than 2 months).
Strange is that some of the delayed deposits (but not all) just appear in a batch after the exchange rate drops by 5-10%. This looks for me like a scam that is done on purpose.
Be careful them!