Hi Amber!
I do feel the Dining Plans are truly worth it! If you compare the total Dining Plan cost vs. what you would pay out of pocket for each meal, you do end up saving (Disney says about 20% savings on Quick Service, 30% on Standard Dining, and 40% on Deluxe).
One year, I held onto all my dining receipts and compared receipt cost (what I would have paid out of pocket) with what I actually paid total for the Plan (Deluxe at the time) and I did come out ahead.
There are some other perks such as the unlimited drink refills at the resort, etc.
It also gives a little peace of mind knowing your food costs are covered before you arrive rather than trying to budget it out each night (which I've done also :-)
For more details on the 3, click the following:
Quick Service Dining
Standard Dining
Deluxe Dining
Best wishes on all your Disney planning!