Poutine!
Is this a UNESCO World Heritage site?
It's a miracle they limit themselves to acting as a poutine Mecca with only this one location.
In preparing to visit Montreal I had researched poutine and encountered La Banquise in the Fodor's guide, on numerous blogs, and on Yelp. However it was the reco from my Montrealer tour guide that sealed the deal for me setting on La Banquise as a destination.
I ordered and recommend Le Miam which has ground beef and merguez sausage along with the classic gravy. However I kind of wish I tried the classic or T-Rex.
If you are visiting its worth the wait for a manger (eat in) to drum up your anticipation, however it is much (much, much) quicker to order it a emporter (to go). There are two (2) separate lines. The day we went the a manger line was 15 minutes wait outside to enter the 15-20 minute wait inside to get a table. The emporter line allowed you to walk immediately up to the register.
I've only known about poutine for 5 or 6 years. Must have been living under a culinary rock. Tried it for the first time in Canada on trip to Toronto in 2010. I think a few restaurants have put it on the menu I'm the U.S. However nothing previous compares to my experience at La Banquise.