Is BitMEX trustworthy?

As someone interested in cryptocurrency trading, I've been hearing a lot about BitMEX. But with so many platforms out there, it's hard to know which ones are trustworthy. Can you tell me more about BitMEX and its reputation in the cryptocurrency world? Specifically, what kind of security measures does it have in place to protect user funds and prevent fraud? Additionally, how does its trading fees compare to other major cryptocurrency exchanges? And finally, have there been any notable incidents or controversies involving BitMEX that I should be aware of?