I hate to be one of the voices of dissent, but my meal at Concourse Steakhouse was one of the worst I've ever had at Disney. While my server was very nice, it took forever for my meal to arrive, the food wasn't prepared how I'd requested (a medium-well steak was still bleeding in the middle), and you could tell it'd been sitting out for a bit. I had been looking forward to a great steak and was so disappointed. The restaurant has been crossed off my list of places to go back to.
That said, with all the other great reviews, it sounds like my experience may have been a one-off. Hopefully, you will have better luck than I did!