Lovely dining room and food is excellent. Best value is the prix fixe.
Coffee is served with a piece of candied citrus peel (nice touch!)
They do a good job of completing the lunch in a hour (but factor in a few minutes to get through the security check to get in the building.
Did not need a reservation on my last few visits.
http://www.torontolife.com/features/osgoode-hall/