Most customers describe Mega Supermarket as a busy and long-established local supermarket in the Finchley area, offering convenient access to a wide range of Middle Eastern, Iranian, and Turkish groceries, along with fresh fruit and vegetables, bread, dairy products, and a halal butcher all in one place. Many reviews refer to the broad product variety, the ability to source ingredients for Iranian and Middle Eastern home cooking, the suitable quality of the meat, and the availability of freshly baked Barbari bread. A number of customers state that they have been doing their weekly shopping at this store for many years and cite long opening hours, easy access, and wide product selection as the main reasons for their loyalty. In part of the feedback, some shop assistants and cashiers are described as polite, helpful, and friendly, assisting customers in finding products and offering guidance during their shopping. Alongside these positive points, some criticisms have also been raised. In a number of reviews, the manner of certain cashiers has been mentioned as an area that could be more professional. In several cases, differing experiences regarding the quality of some items have been reported, with users highlighting the need for closer attention to expiry dates and product storage conditions. In addition, part of the feedback indicates that the price level of certain items has been perceived as higher than expected by some shoppers.

Overall, Mega Supermarket is regarded as a practical option for those seeking a wide selection of Iranian, Turkish, and Middle Eastern products, a halal butcher, and fresh fruit and vegetables in one convenient location.