You can get A LOT of things with the snack credits-doughnuts at Boardwalk Bakery, lots of snacks at the Screen Door place on the Boardwalk-large bag of chips, big box of doughnuts-pretty much anything under $4. You could easily use snack credits for breakfast pateries and have 3 meals pretty much covered.
Our family loves the DDP. However, we also purchase the DDE card-we love alcohol!

The DDP works really well for our family, it's very close to how we normally eat. We eat TS dinner every night on site. We never get a car or go offsite-that's one of the things we love about Disney. We order appetizers and some times desserts. We usually order CS lunch. My kids get really hungry with all that walking. We use the snack credits for some breakfast items at the bakery and for sodas/waters in the parks. We do some character breakfasts and we use the DDE card for them. We also do TS lunch in MGM-I hate their CS food and DH can not live without Brown Derbys cobb salad every trip. We use the DDE card for this also. Oh, and of course we use the DDE card for alcohol with our dinners. There are many places that have CS breakfasts, if you wanted to use those credits that way. The plan is perfect for our family. I should add that we don't EVER plan to cook on our vacations.
In Oct we were 3 Adults (our oldest was 10)/ 2 children on the DDP. My middle child was really unhappy with the kids meals at the TS places. They had just rolled out that new healthy, in my opinion-lame kid meals, and he watched his brother eat steak and other good adult food at Flying Fish, Kona, and Rose and Crown, etc. Even though they have since tweaked the kids TS menus to include some better choices, I am buying the adult plan for him when we go in Dec 2007 (he will only be 9). MS had no problem changing him to the adult plan and I really think our family will have a much better time not listening to him complain

My sons like adult food though, so for us it works. My DD age 5 could live on mac and cheese, so she is just fine with the child plan.
I really don't understand all the people who complain that it was too much food. You don't HAVE to order dessert if you are not hungry. No one is holding a gun to your head. If you are not hungry, don't order it.

Maybe I'm missing something. If you go on a cruise and all the food is included, do you stuff yourself just because it's "included"?? To me it's the same thing. DH and I went to Aruba all-inclusive in 1996 and while I never said "no" to a tropical drink, lots of times I passed on all the food courses. If you are too full one day for CS lunch, save it for breakfast the next day and get 2 items and a drink at Starring Rolls or something.
I can understand that some people don't like to plan their meals, but we always did that anyway, so for us it's not a big deal.