I have to say that as someone who is generally happy when eating out, especially at micro-breweries, I was terribly disapointed in Big River.
I signed up online for their email club just before I went to Disney and got an email good for a free appetizer with the purchase an entree. We had the chicken quesidillas. This was the best part of our meal.
Big River was running a dinner special that was "really good" according to the door host, and it did catch my eye. Steak Diane, served with Grilled Shrimp and garlic mashed potatoes. It was $32. I had the dining plan which they accept, so I went for it. Bad choice. It was awful. Steak was chewy (steak tips), shimp was tasty but cool, and the potatoes were luke warm with little flavor.
We had just arrived at Disney one hour prior and I was not in the mood after 10 hours of traveling to start our trip this way for sure. If I was not on the dining plan I would have probably complained.
During this visit I also had the beer sampler (which is 5, 3-4oz. samples of their microbrews and it was not bad at all), and since the dining plan came with desert I had some type of chocolate desert which was so forgetable I can't actually remember what it was and didn't finish it.
We will not return unless its for an $10 burger or a beer. This place certainly isn't worth using a Disney TS credit on. There are much better alternatives on the Boardwalk.
During our trip we also ate at Spoodles (excellent) and the Cape May Cafe Dinner Buffet at the Beach Club (excellent). If you are on the Boardwalk I would recommend either of these well before Big River.