I think you need to determine how much you would normally eat a day and where you would like to try and then determine what the cost would be. If you would normally eat $35 or more a day, then definately go with the plan.
I just booked a 10 day visit with the plan (free!) and I am wondering how in the world we are going to eat so much. We would never do an appetizer, entree and dessert for each person. I have two teenage sons and my husband who is a big eater and I don't think we have ever ordered more than one appetizer for us to split, 3 or 4 entrees for the 4 of us and 1 or 2 desserts to split. Portion sizes are so huge that we can barely finish what we would normally order. I know there will be food wasted on the plan if we order every item. It will be fun to go and choose anything we want without thought for the cost but if it wasn't free, I definately would not do the plan. We just can't eat that much.
Every family will be different. Whichever way you go, enjoy your trip. AKL is a very nice place to stay.