Fort Knox Main Exchange is a smaller PX with a clean and very good selection for its size. The staff is friendly and the food court has Charley's, Popeyes, a Mexican restaurant, Starbucks and a smoothie place. People find clothing, shoes, cosmetics, wine, appliances, pet and household items, snacks and occasional clearance deals. Hours close between 1700-1800 makes longer shopping hard for most people. Prices are very high but occasional good deals.