They don't let you know they need your facial biometrics to complete check-in. This was after I advised I was not comfortable with sending in my biometrics. Some sonder rep then replied back with just the 4 digit door code. I assumed we were gtg, but the code did not work and the sonder rep over the phone advised they only send over the code after I complete the check-in. They cancelled my reservation since I was non-compliant about sending in my face scan. Wonderful company.