I am one of several people who received an invalid EA code.
I bought the digital CE from the SE store and recived my 18 digit code at the appropriate time. But when I entered it I was told it was invalid.
So I did NOT get the early access that I payed for.
Squenix is not addressing the issue in the slightest.
I should add that by now it is way too late as general access has long since started. Yet I feel that they owe me something in compensation.