Lately le Cartet has become my regular breakfast spot. I enjoy the communal table seating and the interesting art found on the walls.
The food isn't half bad either, the atlantique brunch and the soft boiled eggs are my favorite toped off with a cafe au lait in a bowl. Everything at le Cartet is good I've never heard anyone complain about the food.
The service on the other hand can be hit or miss, if one of the waiters friends happens to drop in for a coffee you could find yourself waiting for them to finish the conversation before they come take your order.
All in all Le Cartet is very nice place with good food and OK service, just remember this is old Montreal so the prices are old Montreal prices a little expensive.