After living in Montreal for 6 years, I've finally managed to get myself to eat at La Banquise! It was around 2:30 am on a Sunday night when I was craving poutine (happens way too often!)
There was a slight line up (be sure you are in the right one since there is a take out and a eat-in lineup). I can't remember which one I ordered but i had bacon and sour cream! It was just amazing!
The staff are super friendly and we barely had to wait for the food to finish!
The second time I went, it was on a saturday and it was super crowded! It was 3:30am and happened to be grand-prix weekend. Had to wait in line for about 10 minutes to sit down. Food came pretty quick.