I have lunch at BRG at least once every trip to WDW. I am heading down tomorrow and hope to be having lunch there on Saturday!
Food is pretty good, beers are different and interesting and the service has always been fine. If it is a nice day, it's great to sit outside on the boardwalk and enjoy a relaxing lunch.
If coming from DHS, take the boat and get off at the Boardwalk stop. Alternatively, you can walk from DHS to the Boardwalk area in about 15 minutes. Once you are in the area, you can't miss the restaurant.