Awesome congrats! Enjoy! For future reference, like next year if you miss your reservation time there is a certain amount of time (days) they hold the device. But when you get there you may have to wait for a rep to help you. They won't release your device for a standard period of time. They understand accidents happen, etc.
Store here told me they have to hold them until close that day.
Different stores also manage appts differently. Reserved for pickup 2x, 2 different stores. Both in same big city, to both had lines for pickup.
One store sorted the line by reservation time, closely managed line, so if person with earlier res arrived after you did, they were put ahead in the line. All told, took about an hour.
Other store had one line for "anything related to iPhone 7.. several people did not have reservation- techs booked for them as they stood in line. If the phone they wanted was in the house, they were golden. This worked out well for kid in front of me. From arrival to exit. again about an hour.
Picked up first phone after online order went mia in shipping problems they're having.
Picked up second today as exchange for first one (color swap). Order arrived in between, so returned that, still in shipping box, at second appointment.
Happy now with 257GB matte black plus!