Worthwhile if you're in the area, but not worth a trip.
Pros: Fast service -- I ordered a combo with a banh mi and a salad roll, and had the salad roll within a minute and the sandwich in a few. Inexpensive -- sandwiches are $7 and the sandwich combo that I ordered (which also included a pop) was $10. My banh mi was reasonably tasty, and was served on a bun that had a bit of crunch but wasn't too crusty.
Cons: The banh mi was quite skimpy on the meat -- it had maybe a third to half as much meat as I would have liked. The salad roll didn't come with much sauce.
I work in the area so I'll be back, but I wouldn't go out of your way to eat here.