Mannan Supermarket offers a good selection of products, including fresh meats, vegetables, and a variety of dry foods. Many customers appreciate the quality of their fish and hand-slaughtered chicken and beef. However, there are concerns about product freshness, particularly with dry fruits that may have bugs and shrimp that might be defrosted instead of fresh. Some shoppers find the prices high compared to other local stores. Parking can also be an issue, with no lot available behind the store. Customer service varies, as some have reported rudeness from staff, especially during the night shift, while others have noted that the security guard is friendly if familiar. Overall, while Mannan Supermarket has much to offer, there are areas that require attention.