If you ever plan to go to Toronto, I highly recommend flying into YTZ via Porter or Air Canada (the only two airlines that are housed there) because it's right in the heart of Toronto City. There's a small pickup/drop-off area for those who are driving in, shuttle buses, and a flowing taxi line just a few steps away from the airport.
Check-ins are swift and custom officers are friendly. There's also a lounge with complimentary tea, coffee, soda, and cookies (!!!), plus plenty of seating area, free WiFi, and charging outlets at each seating area.
When you arrive and depart, you'll take a 60 second ferry to/from the airport. The waiting area to/from can get crowded, especially with all of the luggage that everybody brings on.