[dmix]

Does it have chip & pin? It will need that to work well in Canada.

[iancarroll]

I was in Ontario for a few days and saw no problems using a mag stripe instead of a chip. (We do use a chip when we can thanks to Amex though)

[ubernostrum]

I've successfully used chip and signature in Canada and in Europe.

Hell, in larger cities I've successfully used mag stripe in Canada and in Europe.

My general experience is that all the "you must have a chip and PIN card or you'll never be able to buy anything anywhere" advice is overblown.