Tried this casual Vietnamese place last weekend and was really impressed. They serve banh mi, pho, bun (vermicelli), and a couple additional things like spring rolls, nems, bubble tea, and the like. They allow you to customize what you want on your sandwich, but I went for the traditional. I tried the tofu and the chicken banh mi, and both were very good. The fried tofu, nicely flavored, was really dynamite. Both sandwiches were very large, on fresh bread, with (as specified) the traditional cukes, pickled carrots, cilantro, jalapeno, and a lovely aioli. Quite a good value at $5 per sandwich, I thought. They were also served with a few veggie chips.
You order at the counter, and find your own seat. I really wish there were another one of these in my neighborhood (U Street). I would be there all the time!