I think it depends on how much use you feel you'll get out of the features, and whether you're willing to pay more to have the freedom of really doing whatever you want, knowing that it's already been paid for.
We did Deluxe Magic, with the 3 meals a day, and usually had a pretty nice lunch and very nice dinner. We made sure to order appetizer, entree, and dessert everywhere we went. We ended up just grabbing a quick breakfast from Gasparilla's most days, and still were absolutely stuffed. But the nice part was that we could sit down and order the lobster and filet mignon without having to count the cost. I'm the kind of person who worries about price, so the freedom of the plan was incredible!
We also did quite a few recreational activities, like horseback riding, bike rental, and water sprites rental, so that helped us get more of our money's worth, too.
When we came home, we calculated that even with all that, we would have saved about $600-700 if we had paid for everything individually. And we were on a 9 night stay at the GF. For us, though, the extra money was worth it, and in fact, we are going with the Deluxe Magic plan again for our honeymoon this August.
Cheers!
Heather P