This might be the least expensive tablecloth/full-service - type restaurant I've ever been to. First trip had an excellent pork banh mi ($4), second trip had a huge spring roll ($2) and big bowl of chicken pho ($5). All have been excellent and comparable in flavor/quality to my favorite Vietnamese places. It's easy to miss - look for the white building with a round, red logo painted on the front, just to the West of 13th Pl, and park behind it.