Finally visited today. Different ownership than the Rockville branch. No tables, strictly a deli/grocery. No menus available, just two dry-erase boards behind the counter. I got two banh mi, one pork and one chicken. Both were tasty. Too late, I noticed they offered a shrimp cake banh mi (not offered in Rockville) which I will get on my next visit.
This is the only Vietnamese food that I know of east of Wheaton (I assume Saigonese is still in business), so I will return.