Cryptopia is a great site. That said, I've noticed they sometimes take longer than the other exchanges to process withdrawals. Fun site to use though, plus they list a lot of great hard to find coins.
The most important problem of cryptopia is that they are taking a lot of time in order to process all the withdrawals and deposits. The DEX works fine, i like the exchange, but the only issue that they have with almost all the customers are the withdrawals.