The big catch: Samsung Pay only works with "select" Visa credit cards from one bank, CIBC. You're out of luck if if you pay with debit or prefer to stash your money elsewhere. More banks and cards are coming, but the service won't initially be as ubiquitous as Apple Pay (which supports debit and most Canadian banks). At least you won't have to worry as much about where you shop. Samsung Pay has the advantage of working with virtually any payment terminal, so you won't have to reach for old-school plastic as often as you might otherwise.