I liked the app but found it incorrect several times. Because we were on a special cruise, the dinner menus were not always correct. We also queued up to see a show in WDT (according to the app) but the show was in the BVT. Good thing it wasn't a very popular show and we were able to get a seat.
Other than that, it was nice but I also liked to see the daily navigator for an overall view of events for that day.