Hi there, Alison!
Three sit-down meals a day is going to offer you a great deal of delicious Disney cuisine! If your family enjoys large, multi-course meals and/or buffets, then this plan could be ideal for you. If, however, you tend to be, as a group, more "snacky," then the Quick Service or the Dining plan plan might be better suited for your needs.
The main quarrel with the three table service meals is that so often, the snacks go to waste since Guests are so full from meals! I have also heard that people can sacrifice the midday meal, having eaten a filling breakfast and anticipating a big dinner.
Many people will purchase the standard Dining Plan, which offers a combination of Quick Service and Table Service. This way, they get to try a little bit of everything.
More information on the Disney Dining Plans
can be found online.
Have a wonderful time!
See you later, celebrator,
-Deborah B.