If you're looking for a quick pick me up on your way through Old Montréal, you shouldn't stop anywhere but Café de' Mercanti! With a multitude of delicious pastries to choose from and some of the best coffee in Montreal (the mocha may have been the best mocha I've had anywhere) you will definitely find something for anyone to enjoy.
Most notably, when I asked the owner for recommendations for places to go in the city he came up with a very detailed list for me and my friends and made sure we were set up for a wonderful trip! I would definitely recommend this spot to anyone visiting Montreal!