Absolutely HORRIBLE & SO Frustrating! It's the ONLY way to book dining or fastpass entry to rides, but it's clumsy to use and incredibly difficult to navigate. Reservations can be booked 90 days in advance! So you definitely can't get one for same day. But you can get on the standby list! But only on the app, not in person. And you have to be close by the restaurant to use the app. And it has to be right after they open, but the app doesn't tell you what times they open! Also no way to call