It all depends on what and how you usually would eat. If you would normally do a table service meal every day, it may be worth it. If you are more of a counter service, grab and go, type person then it probably isn't worth it.
The best way to figure it out is to check out the menus on wdwinfo or on allears and calculate approximately what you would spend on your meals out of pocket. Personally, unless we go during
free dining, we don't feel like it is worth it for us.