As many have said, it's really all down to personal choice and eating habits.
For fun, lets break down a Deluxe Plan.
Staying at AoA, and eating 3 meals a day and 2 snacks, an adult would need to spend at least 109.53.
Lets see how that breaks down (NOT choosing the "most expensive item on the menu, but choosing stuff that sounds delish).
AoA Breakfast - 1 credit
Create your own omelet - $8
Orange Juice - 3.50
Coffee - 2.50
After tax, lets say it's $15.
Credit left for the day 94.53
Snack in Tomorrowland - Cream Cheese Pretzel - 4.50, or 4.60 after tax
Credit left for the day - 89.93
Lunch at Crystal Palace
$30 flat (includes drink) + tax, so, $33
Credit left for the day - 56.93
Snack as popcorn for the 3p parade - 3.50 with tax around 3.60
Credit left for the day - 53.33
That's a LOT of money per day left over...can it be spent?
Dinner at California Grill (with the food you get from the DLX plan).
App - Three Meat Signature Meatballs - $16
Entree - Bell & Evans Chicken - $37 (see, I even included the chicken dish, and aside from the Ravioli, it is the CHEAPEST entree)
Dessert - Chocolate Pudding Cake - $14
Drink - $3
Tax - $7
Credit left for the day - (23.67) - Right, negative...
So, in this case, you come out ahead. More so if at Cali I'd ordered something like the Swordfish or the Ahi Tuna, both are 8 bucks more expensive.