M4 Vapor offers a good selection of e-cigarettes and a wide variety of flavors, with friendly and knowledgeable staff. Customers appreciate the availability of items that are hard to find elsewhere and enjoy competitive prices. The store has steady business and regular customers. However, some find the prices high for disposables and note that staff can sometimes be dry. Overall, M4 Vapor is recommended for those seeking specific products and a reliable vape shop experience.