Considering that I've been eating Banh Mi from Garden Grove, California - Vua Sandwiches appeals to me for a number of reasons.
Service: The service here is pretty friendly. They gave us some good suggestions and could tell that we were from out of town. They speak both Vietnamese and French here. They gave us two complimentary Cafe Sua Da which were strong and tasty! Just like how a french pressed coffee should be.
Food: The sandwiches here are much more rich than the ones that I had in Orange County...mainly because they put a lot of mayonaise/butter sauce on the outside. They even offer to toast it for you. I had the Dac Biet (Special) and tried some of the Xa Xiu (BBQ pork) which were all really tasty. The pate is rich and is probably some of the best pate that I have had.
They also offer some take out sushi and che along with french baked goods. You can buy some food to go (there is limited seating) or enjoy your sandwiches out in the park. We took our sandwiches back to our hotel.
Bottom Line: Buy 5 sandwiches and get a free drink!