I usually eat at Big Al's one time for every stay at The Orleans. It's offerings and preparation aren't anything to write home about, but they stay within their limitations and turn out decent seafood/cajun dishes.
Perhaps I've become jaded towards casino fare. I was shocked when my Father-in-law finished his gumbo and declared that it was the best seafood dish he had EVER had at a restaurant.
I won't go that far, but you won't be surprised with Big Al's. It's exactly what you expect and sometimes that's all you can ask for.