We used our vouchers at Beaches & Cream, Tangierine Café, the ABC Commissary (MGM) and the Sunshine Season Food Fair (EPCOT). Both B&C and the Tangierine Café were good values. The amount of food they give you at the Tangierine is unbelievable! We pretty much broke even at the Sunshine Season Food Fair and at ABC.
I've eaten at the Pepper Market (Coronado Springs) but not using vouchers. They automatically add a 10% gratuity to the bill for those who dine in rather than take out their food. Using the vouchers covers that gratuity. The food is also very good there and cooked to order.
If you take a look at the second post in the "Everything You Wanted to Know About Connections Meal Vouchers" thread stuck at the top of the board, you'll see that elfbo marked the restaurants that are better deals with an "*". The great deals are marked with "**". For the most part, the better deals are in restaurants located in the resorts, not within the parks.
I like the vouchers for their convenience and the fact that I've prepaid for my meals. I can hand one to DS12 and he doesn't have to try to figure out whether he has enough money in his pocket to buy his meal plus pay the tax on it. (Math is not something he does while on vacation!) He just hands over the voucher and gets his food.
I hope that you're able to use your vouchers to your advantage. With careful planning, you can get a lot for what you paid. But if you go with the expectations that you'll break even or come out a few cents ahead on each meal, you will not be disappointed.