This is a small airport close to Downtown Toronto. The airport is on a island. You must take a ferry if you want to bring a car or take the underground pedestrian tunnel. Getting through the airport is a breeze. Not much in the way of waiting in line to get through security as it is less busy. I took a flight from Chicago here and the airport is clean and with modern amenities. They don't have much in the way of food options after security.
Another good feature of this airport is that they have buses that take you to the entertainment district of Toronto, which also includes Wi-Fi. Overall, I highly recommend taking this airport, which is the hub for Porter Airlines. Chances are you'll feel less stressful than taking a flight at Pearson.