As a Montrealer, I always bring visitors to this old school deli. Everyone loves it.
If you expect "Spic and Span" cleansiness and world class service, this is not a place for you. If you want a really good smoked meat sandwich with a homemade dill pickle, this is the place to be.
The waiting line can be long. The longer you wait, the better the sandwich.
On the minus side - Since it is such a popular joint, they expect you to pretty much "eat and get out" ... FAST. Never mind lounging around after your meal and talk about the weather with your buddies. Just get out fast and go visit all the bars on that same street.