I'm really surprised about the rating as I was dilated to eat at Au Lac. The place is small, right, but it isn't a big problem for me. The thing that counts is food, and it's REALLY delicious.
The portions are enormous - don't go there unless you're starving ;) Anyway, spring rolls and vegan shrimps are my number one. Damn tasty.
And it's really cool to get such a big portion for a low price.
Cons: Small interior