Hi everyone!
We decided to splurge and do the Fantasmic dessert package earlier this month. I will agree with the majority and say that this was worth it. In our family, I have grandparents who would otherwise skip the show due to the hassle of waiting around for a good view, so I thought this might be worth a try.
Since it was my idea to do this package, I waited in line from a little before 6:00 pm. The CMs hadn't even put the sign out when I got there, so I just stood around near the churros cart. (If you look on the ground, you can see the gold covers for the hole where they put the sign - that's where I stood). Right around 6 pm, the CMs came and put out a sign but didn't put up the ropes. I stood there alone for another 30 minutes until the next party showed up to wait along with me. Around 7:35, the CMs allowed the line to move up into the reserved area near a podium. At 8:00 on the dot, we were allowed to choose our seats.
I chose the 5 seats in the front row that were together (seats 5-9). Great seats, although I think seat #5 is partially obstructed by the concrete pillar, but it was not problem for our family member who sat there.
Also, my father was in a wheelchair that evening. The CMs allowed us to seat him early so that we could arrange the chair. There was no problem wheeling the chair right up to the reserved section as it is all flat sidewalk.
Service was excellent. Our waiter was very attentive and kept the hot chocolate and bottled water coming. We each took a bottle for the road. The dessert platter was a lot of food, very delicious and sweet. Pictures have already been posted so I won't go into detail about the contents. And we did indeed snack on it for the rest of the trip. Bring a wide bottomed shopping bag to take your dessert platters home with you afterward.
[Not sure if tipping is normally done, but we tipped our waiter $10 ($2 pp). He gratefully and cheerfully accepted the tip.

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The view of the fireworks was great and a real bonus for the grandparents who wouldn't normally see the show.
I would do this again but probably not next year. It is a hassle to wait around for 2 hours just to ensure a front row seat. However, I enjoyed talking with the other guests while we waited. If you can arrange with your party to wait in shifts, it would be less taxing on one person.
We all thoroughly enjoyed seeing Fantasmic and the fireworks this way!