If you like smoked meat and dive restaurants, you cannot go wrong with Schwartz's. First, there is ALWAYS a line outside so don't let that stop you from choosing to eat here. Wait in the line, it's worth the wait.
The place is full of Schwartz's Montreal history all over the walls with newspaper clippings and photos of all of the famous people who have visited this place. It's very cozy inside, you'll be sitting right next to people, but you'll be served fast.
I always get the lean smoked meat sandwich with the pickle and fries on the side and am satisfied every time. If you're visiting, you can go next door and buy yourself some of their meat to take home.