Before our trip, I studied the restaurant reviews here and the menus on allearsnet.com and consequently, we didn't have a bad meal. But with that said, we enjoyed the Cape May Clam Bake the least. I heard that it was a so-so experience, but booked it anyway because it was convenient and fit into our plans on one particular day. (We were staying at Yacht Club, had been at AK all day and wanted to swim at SAB then have a late dinner.) It WAS super convenient, but since we had park hoppers, we could have walked 5-10 minutes longer and had better food at one of the Epcot WS restaurants.
What was good:
1. The Clam chowder
2. The dessert buffet, esp. the Oreo Bon Bons
3. Most of the "regular" food (non-sea food)
What was bad:
1. The shrimp (VERY VERY overcooked)
2. The mussels (a funny taste)
3. The clams (most of the shells were empty)
The other fish was a fish 'n chips type of fish which tasted okay, but they brought out only one skillet of 6 pieces of fish at a time, so it was hard to get any.
The best seafood I had at WDW was at Teppanyaki...we tried scallops and shrimp and they were cooked perfectly, and served to us immediately.