I came to La Banquise under pretty much universal recommendation for my first poutine. Indeed, the poutine was good (if a plate of French fries with condiments can ever be called good) and the environment was very much made of locals.
The line upon arrival was long, but it moved fast enough. I was slightly put off by the fact that it's cash only and they only accept Canadian debit cards (weird). If you want to come here for lunch, don't forget to get cash first!
As far as the portions, the small is actually pretty large since it's fries. I couldn't even finish it, and I'm used to large American portions of everything.
Overall, it was worth it just to say I tried a plate of poutine. I'm probably never going to have it again but I would recommend this place if you want to try the dish.