I just recently registered in whitebit on Sunday for the reason to sell some of my MB8 coins. Well, I am testing this exchange site, so far its good, the chat support is active and responsive. For the security, I dont know yet, I am not yet submitting my personal details for KYC verification.
In general, you are having a good experience with this exchange but my advice is that you should not submit information to complete KYC because this is a very strange exchange for many people, we don't see its reputation in the market, rushing to send personal information is not good. In addition, you also do not often use this exchange when the market has too many good exchanges such as kucoin, binance, bittrex, sometimes you just need it for liquidity, no need to think about KYC confirmation when it's not needed