Their caramel apple cinnamon bun is worth the walk over every time. We've recommended it to people and they've never come away disappointed.
Bread is good - comparable to other bakeries in the area and they have a nice variety of unique specialties to choose from. Chocolatines are wonderfully chocolatey and seriously...if you haven't tried that cinnamon bun yet you don't know what you are missing. As an added bonus they carry coffee beans from St-Henri. Win win!
Staff are friendly and chatty, and the lineup is very reasonable.
Go early, go often.