Don't go during the business lunch hour rush. The line will be winding round and round.
Never order their non-Viet sandwiches, there's simply not enough demand for them to be fresh.
Shredded chicken (#2) ain't so good. Veg not pickled enough.
Drinks are way too sweet.
It's cheap, people say? Not for the quality you're getting.
On the plus side, they actually have a very efficient system of ordering and their packaging is to be admired.