Thai Express is a new fast food chain in Viet Nam. It's new for us but it's been popular for a long time in a few different countries. It can be called fast food but I think it's more gourmet as it is very tasty and not really expensive.
I tried Thai Express the first time with my friend in Saigon and last week in Hanoi. I was impressed by how busy they were already, by the good food they served and by the helpful staff. The only thing I wouldn't recommend is the coffee which was not the best but the other drinks were fine. They made very nice salads, stick noodles with seafood in Tom Yum soup, Thailand's pineapple rice fried with seafood and quite a few other Thai specialties.
This is a great place for a quick lunch if you don't have lots of time. For those who are vegetarian it's also a good place to pick. It's an air-conditioned restaurant which is vital for the hot summer weather Hanoi has at the moment. If you are in Hanoi, Thai Express is located right at the top end of Hoan Kiem Lake with a view over the lake. In Ho Chi Minh City, they are pretty centrally located in District 3 but have no view. You'll just have to make do with a great smile from the staff.