I like the medallion and use it for the same reasons I used to use the card. Getting through security while leaving or returning to the ship, opening the door to the stateroom, purchasing coffee at IC, purchasing anything on the ship. The medallion app on the phone is not necessary while using the medallion. But I like the app on the phone because it shows the schedule of events each day, the menu for the MDR, and my onboard account. I use it for nothing else.