We just returned from Disney and we got the dining plan. It was great, all worth it and nice not to have to worry about carrying money around, just use your room key and sign a receipt and you were on your way. We had 4 days of dining to use. Depends on if you like fast food or sitting down or the combo of both. It was totally worth the plan to us. The breakdown is about $35 per person per day, remember that is a snack , counter and a table service for each day and tip on each meal. We had not used most of our snacks so we got them our last day at the resort to take with us. Table service restaurants can be really pricey and most pay for the plan in just those meals. You get a lot of food with counters and tables. Plus you are not restricted to eating only at the parks, you can eat at any of the resorts and a few Marketplace restaurants.
24th - First night we went to our local food court (Everything Pop) and got the penne chicken alfredo (which is about $7 - pasta, chicken, alfredo sauce and garlic breadstick) and tie-dye cheesecake (almost $4) plus we got a medium drink for a counter service.
25th - breakfast - we just got pastries which we paid cash for and drinks with our snack plan. Lunch we used for pizza from Pizza Planet in MGM. We got the combo which was a salad & pizza, then we got the rice crispy treet and a drink all for a counter service (The total was about $10 each) Dinner was at Crystal Palace for the Christmas Day buffet (was about $25-30 a person)
26th - Lunch was McD's in Animal Kingdom with counter services and that came to close to $15 for each meal, was dessert, beverage and combo meal. Dinner we went to Hoop Dee Doo (bread, salad, entree, dessert and beverage, including alcohol) and that was about $50-55 a person (2 table services though)
27th - Snack from cart at Epcot ($2.50 each), Dinner at Marrakesh (about $100 for 2) that was bread, appetizer (we got the one for 2 people), dessert, beverage and entree of our choosing (we got the kebobs)
28th - Breakfast was counter service at Pop of waffle and sausage with a drink (was about $8) Breakfast platter was about $8 as well. Got to use 4 snacks for drinks and snacks for our trip to Cocoa.
We just took our own water bottles and refilled as needed, better than using a snack on a bottle of water, when it could go for cookies, rice crispy treat, popcorn, ice cream or fruit.