There's a lot to like about Toronto Pearson airport:
*Free Wifi!!! On behalf of travelers everywhere, especially those with dodgy cell phones that don't work in Canada - thank you!
*Clean concourses and seating areas
*Extremely efficient immigration + customs personnel
*Ability to clear US Customs/Immigration in Canada, thus saving me a ton of time in Chicago
*Good, clear signage. As a bonus, it's in English and French, allowing me to refresh my Francais skills.
On the minus side:
*Not enough seating in the gate areas
*Food options in the US Flights area - not much to choose from. But there Is Tim Horton's so...
All in all, a better than average airport.