Stex exchange is a cryptocurrency only exchange. It is available for the exchange of cryptocurrencies, stable coins and altcoins so if you are thinking of exchanging flat Currencies, Stex exchange is a wrong choice. At least it supports up to 514 coins altogether. It is a registered exchange under the Estonian financial regulatory bodies.
The exchange score 'B' if I am to rate them on the security as it provides the best security, first by subjecting users to rigorous verification process usin cryptonomica resources and also by requiring all necessary documents including driver's license and passport. I believe this is an act in the right direction to sieve out fraudulent traders.
It also secured with 2FA which nnect the users email to his platfom account. It also uses cryptocurrency security standard (CCSS).
Since they are only cryptocurrency exxhange, the deposit methods does not include bank wire but credit and debit cards are accepted. Cryptocurrency deposit is equally permitted.
My only fear is that a trader that is not serious enough and beginners may not patronize the exchange due to the high demanding verification procedure.