Most customers describe Caspian Sandwich Shop as a busy and popular Iranian fast-food venue, well known for Iranian street-style sandwiches, Iranian-style pizzas, and large portion sizes. A significant proportion of the feedback highlights the flavour of sandwiches such as bandari, Philly cheesesteak–style options, large burgers, and generously topped pizzas. Users often note that the bread and fillings are, in most visits, fresh and well filled. In many reviews, the venue is presented as a simple, no-frills fast-food option for takeaway, delivery, or a quick meal, which for some recreates the atmosphere of Iranian street food. A number of users also mention reasonable pricing for a typical meal, menu variety, the availability of distinctive sandwich choices, and portion sizes that exceeded their expectations as positive aspects. Alongside these favourable comments, some users have felt that the quality of the food has declined compared with the past, with the taste of certain burgers or pizzas being below expectations. In a few limited reviews, differing experiences relating to the manner of some staff members, or the crowded and sometimes disorderly indoor environment during peak hours, have been mentioned. In several cases, users have also referred to differences between the experience of ordering in person and ordering via delivery platforms.

Overall, Caspian Sandwich Shop appears most appealing to those seeking an Iranian fast-food experience with generous sandwiches and pizzas in a simple, casual setting, without expecting a formal atmosphere.