This is my go to place for Vietnamese food in Montreal. After spending time in Vietnam it's been challenging to find real tasty Vietnamese food in North America, but this one is great. It is authentic, everything is fresh and the food is delicious. service is very fast and the waiters are nice. We had rolls for appetizer, and pho soup after (one had the grilled beef with noodles which he loved) that were above in beyond expectations.
The downside is that they close very early (9pm) and there's always a waiting line, so go early if you don't want to be rushed out !