Worked flawlessly! I completed the form and waited for the email with the unlock code. They wrote to me to check the data because it was getting hard to find the code, and anticipated that if not found they would refund me.
One hour later the code was in my email with the instructions, and worked flawlessly in half a minute!
I have a Samsung Note 3 that was locked to operator Personal Telecom in Argentina.
Thank you!