But fibbi how are you going to pay the bill like some one said? You need to pay in USD, so you still need to convert CAD to USD and you lose money on the conversion anyway, right?
For the US credit card I got with TD Bank, I just paid with US fund in my US account.
Whenever the rate is good (like now) then I will convert some Cdn $ to US$ la... then can use it whenever I like la.
Just came back from the States yesterday. Costco @ exit 206 takes couple Canadian Debit cards, TD, Scotia, Royal Bank. And they have self checkouts, way less lineup there.