So I stayed at Art of Animation resort this past weekend and got to try out the MagicBands. I have to say... I was really apprehensive about it at first but I absolutely loved it. Being able to select FastPasses for 3 attractions at a park from your hotel room on your phone is a GODSEND. The only drawback is I might gain weight from not having to walk all the way to the attraction to get a FastPass and then eat **** for two hours until it's time to ride and walk over to the other attraction for a FastPass, etc. This is especially useful at parks like DHS and Epcot that only have about 3 real signature rides.
I love love loved it. I don't know what Disney will really get out of it for the money they spent but since we didn't spend anything extra on it, it was absolutely worth it. Also, just to be clear, we made the reservations same day for that park so not as much "advanced planning" as we worried.