There's always a line here and it's there for a reason. This is the best Poutine in Montreal.
I'm not a huge huge fan of Poutine but at least La Banquise makes it bearable for me. There are tons of options, ranging from the Classic with cheese curds and gravy to toppings like hot dogs, corn dogs and sausages. Each of the different options is just a classic Poutine with additional toppings on top. If you get a burger and substitute the fries with a Poutine--- you get a regular portion of Poutine. Quite a lot of food. I think 3 orders for a group of 4 is the perfect portion.
The Guacamole is too creamy so I'd avoid that one, the B.O.M. was really good but just too much for one person to handle so i guess the Classic is the way to go.