We did the meal deal last February, we all agreed afterwards that it was not worth it. For us- to see any value for it, we felt like we had to eat two portions or more. The deal is worth it if you want to over eat. If you just want to eat a normal meal, you would be better off just paying for everyone as normal. The prices in US & IOA parks are relatively inexpensive. Unless you plan to eat a great deal for every meal, I would not recommend the deal.
Also the places that honor the meal deal don't open until after 11, so you are only getting 2 meals with the deal.
We did find value with the drink special, we shared one between the 4 of us, and it worked out well.
Good luck with your decision. Have fun!!!