We were able to use it on our 10 night vacation, 6 nights at Waldorf and 4 nights at Doubletree Disney Springs. We had both stays linked to our Disney account. We would just show them our room key and they let us go through. The one time a cast member kept scanning my magic band and it would not work, I told her where we were staying and she was confused, finally another cast member came over and told her we just needed to show the room key. There was nothing else special that we needed to show.