IMO, it will get a lot of recommendations because it deserves it, especially for one TS credit. It is more of a variety seafood buffet, not fine dining. The OP is only looking to use one TS credit, so that needs to be taken into account accordingly.
OP, our family loves Cape Mays. The interior of the restaurant doesn't have the theming of other locations like Coral Reef, Ohana, etc, but it has a large variety of good seafood options. We love going to Cape Mays on an Epcot or a HS day and walking or taking a friendship boat there. The outdoor area of the Beach Club, with the beach out front looking across at the Boardwalk is one of my favorite location in all of WDW.
Dan