First of all, the food at the Bedega Bistro is rather delicious. Whether it's the Hanoi street food or normal appetizer, or the entree (we get the filee minion, of course cooked Vietnamese style), they are all well seasoned, and presented with plenty of greens and herbs. Cilantro lovers can further rejoice.
In addition, I really think this is one of the best place to book before going to a concert/opera. The restaurant is roomy so one doesn't feel crowded, and it's very close to the concert hall. If one is in a hurry, order the pho or some rice dish, if you do have some time to spare, one can try the more unusual items on the menu. It's so versatile I think everyone will find something they like (provided one in general enjoy south-east asian food).
Overall, a great experience.