40K is quite a substantial number.
Vietnamese cuisine is quite regional, so I usually ask when I’m in one where the owner/chefs are from in Vietnam. In the case of Anna Kitchen here, the owner, Anna Nguyen, is from Dalat, which puts it in Southern Vietnam - they do pork chop rice very well, and their banh mi sandwiches have a good amount of salads. Their bun mam (seafood noodles with fermented fish sauce) and bun moc (pork ball noodles) are good. They also do banh xeo (crispy crepes) very well.
I won’t order pho noodles from them, though - only the Northern Vietnamese do pho well. Somehow, you won’t get the same taste once you get out of Hanoi and the Northern regions.
The best city in Vietnam to go to for a food tour is Hue, the former imperial capital, where 1,300 out of 1,700 listed Vietnamese dishes originate from. Hue is in Central Vietnam, and shares the same culinary culture as Danang and Hoi An.
