Highly overrated. We arrived around 3pm hoping to grab quick poutine. The line outside was over 40 people for a table inside - we waited for 10 minutes and didn't move once. While my friend continued waiting on the line I poked around and learned that there was a takeout line as well. We then hopped on the takeout line, ordered within minutes and got our food about 10 min later.
We ordered the classic, the one with guacamole, and burgers. The poutine was horrible. The fries were soggy, the cheese was squeaky and not flavorful, and the gravy was bland. I was highly disappointed since we were told this was the best poutine in Montreal. Wouldn't recommend it unless you're totally wasted.