I've been multiple times. They serve bánh bao (steamed buns) to take away. It seems to be very popular with great reviews and lots of customers. They sell large savoury buns (12,000-21,000d): chay (vegetarian), đặc biệt ("special" with meat and eggs), vịt muối (salted egg). They also sell the very popular smaller sweet versions (9,000d): golden yellow (filled with some kind of tasty sweet paste) and white (a thick milky version which I loved). They also sell dim sum.