For us, it is worth it as a splurge. We have done it the last 2 years. No having to stake out a spot for hours, and you have an actual chair to sit in for Fantasmic and the Fireworks with a pretty good view (if you do the early Fantasmic showing, you get the bonus of getting to stay in your seat after Fantasmic to watch the fireworks). The box has cheeses, crackers, fruit, and several different desserts. They also serve you drinks and treat you like royalty. (Watch out for ordering the hot chocolate though because between that and the desserts, I felt like I was in complete sugar overload!- Although I really did like having the hot chocolate out there

) Here are two review blogs with some photos of what is typically inside the dessert box:
http://www.disneyfoodblog.com/2010/...ds-fantasmic-premium-viewing-dessert-package/
http://land.allears.net/blogs/lauragilbreath/2009/06/ready_fantasmic_dessert_packag.html
One person will have to line up to check in and pick seats, and you will find at least a few people lining up an hour in advance of the check in time. Everyone else can continue to roam the parks though. The check in time is at 8:00 whether you are doing the early or late Fantasmic showing. After you do the check in/seat pick line, you can roam around that park area some more (assuming you are doing the early show- otherwise you have time to pretty much go anywhere you want) and then return to take your seat around 8:30ish (again assuming you are doing the early show). You don't have to be there right at 8:30, but you want to give yourself time to get your drinks served and eat, plus when the show gets closer getting in and out of the area is not easy. Also, be sure everyone goes to the bathroom BEFORE you go to the area and take your seats. The first time we did it, DD (then 4) decided to have an "emergency" about 10 minutes before the show started, and we almost did not get back in even though the show had not yet started because a traffic directing CM with a light stick was not going to let us go to the dessert area even though we had gotten back right to the entrance because the about 5 steps over to the steps down to our seats was across his flow of traffic--- luckily another CM intervened and told him to let us through otherwise we would not have been allowed back to our seats.