ZGirl and other GP Fans.
Montreal is a Great City and you should have a blast!!! I find that Montreal is more like a European City while Toronto is like a safer Chicago with less culture
I know you Leaf fans are going to flame me, but I lived in the Big Smoke for two years and it's one of the last cities in Canada I would ever live in.
Back to Montreal, it's likely the best weekend of the year. However, it's nuts! I usually go for a day of qualifying and then go to the Vieux Montreal section for dinner (and watch all the gorgeous women and cars go by (my favourite two things to watch). Then I get the hell out of town before the real party starts.