I am going back tonight, in fact.
I've been to Great Wall numerous times, and i'd have to say it never ceases to amaze me. The salt baked salmon and hot & spicy chicken are just two of my favorite dishes there. The service is fantastic, food is delicious, and you really get your money's worth here. Trust me that you won't regret your visit when you come to the Great Wall, but it does get busy fast, so you should make reservations.