When in San Francisco, if you don’t mind a neighborhood that has a little grit, then head to Saigon Sandwich in The Tenderloin. This little walk-in joint has amazing Banh Mi sandwiches. On Yelp they have a 4.5 star rating from 2644 people. That says it all. And better yet a sandwich is $3.75. Cash only. This is real deal folks. Incredible!