Funny seeing you over here!!! We have used the meal plan on our two most recent trips and we like it. We are getting it again for Sept. Although it saves very little money (although it does save some....) we use it for budgeting and ease of use. You will never lose money if you are logical. If your total bill is $6.50, don't use a $10 voucher, use a five and some cash. You can use the cash value vouchers in any combination and (unless I am not remembering correctly) the character meal vouchers include gratuity. If you like having the bulk of your budget set prior to going and take a bit to preplan your meals, it is a good thing. I did a trip report on my views on it a year or so ago. I'll add it if I find it!
Found it....
http://www.disboards.com/showthread.php?t=431096
Also, last year we did not have to pay anything out of pocket for Goofy's kitchen, the voucher covered the whole cost.