The Marketplace at John Gross is a well-regarded store in Mechanicsburg, known for its diverse selection of foods and friendly staff. Customers appreciate the variety of items available, including frozen and fresh products, bulk foods, meats, sauces, cooking supplies, and snacks. Many highlight the great prices and quality, particularly for tuna steaks, lump crabmeat, chicken tenders, and deli items. Shoppers also commend the helpful employees, especially the cashiers, and the efficient packing of purchases. The store is described as a hidden gem, with some calling it Mechanicsburg's best-kept secret. While most reviews are positive, a few customers noted that the assortment could be better, particularly regarding beef options, and some found certain prices to be on the higher side. Overall, The Marketplace at John Gross is a popular destination for families and small businesses looking for quality food and a pleasant shopping experience.