If there is one thing I learned during my trip to Montreal, it's that if you have to wait for it, it's probably worth it.  The line was two the door when we stepped in, and soon after spilled on to the sidewalk.  The food is divine--I had a sandwich (La Paryse) that was overflowing with complex flavors, and my friends all had hamburgers.  We all agreed that it was the best meal that we enjoyed during our ten day trip.  The atmosphere is great, too.  The dining room is well lit and colorful, and they give you crayons to use while you wait for your food.  It was a wonderful dining experience.