Seeing the FBI paid more than $1 million to gain access to San Bernardino terrorist Syed Farook's iPhone for their hacking services I would say it's pretty secure. Don't forget you got ten tries before the phone erases all data if you have it turned on.The problem is that the 6 digit numeric passcodes aren’t very secure. You should have a 12+ character alphanumeric code with special characters, and that’s a real pain to type in every time. The X isn’t worth losing TouchID for me.