I had an absolutely delicious dinner here 2 nights ago. I'm actually quite lucky I found some space (so if you can, try to book in advance).
I was welcomed straight away and whisked to an empty table. the waitress was very friendly. i ordered fried fish cake for starters, which came with a fresh sweet chilli dip. Delicious and the portion was just right. For my main I order a beef dish, I think it was called Shakey Beef something or other. The beef itself was perfectly cooked, nice and light a good portion and not too spicy (the way I like it).
I wish I had space for desert, there was a stick mango rice pudding I would have loved to try out ... maybe next time.
If you're into Vietnamese and you're in Zurich - you need to ry this place.