5 star for Chambana, maybe 4 star in general.
You would be hard-pressed to find better banh mi in Chambana, though that wouldn't be the case up in Chicago.
The pho is good, but a bit pricey for the portions. I would recommend NOT getting the bubble tea, unless of course you're cool with powdery bubble tea rather than fresh.
The reason this earns such a high rating from me is the banh mi sandwiches. Relatively cheap and filling and delicious! Not the absolute best, but still pretty damn good.