we used the dining plan in june and really enjoyed it. It's nice to not have to worry about how much you want to spend on a meal and just order what you want. I love to taste dessert after dinner even though I can rarely eat the whole thing, and that was possible with the plan, without having to spend an extra 5 dollars a meal. Some of the appetizers were amazing and I'd never consider ordering an appetizer if i was paying for the meal, probably for the same reason, I wouldn't eat it all. also the counter service is really nice, if we didn't use it for lunch we used it for breakfast the next morning. We still got our moneys worth, since we 'spent' so much at table service restaurants. And finally, while we didn't use the snack option for snacks most days, it was nice to grab a soda or bottle of water with those credits, especially in the summer months when you drink a ton to keep hydrated.
But it does depend on your eating style on vacation, if you NEVER eat counter service meals it might not be worth it.
maybe you can write out a test 'day' of meals, what you would have for breakfast, lunch and dinner, where you would eat for each or if you would have all the meals. Then add it up and see if it's worth it with the meal plan.
tricia.