The thing you have to be aware of is that Amex Canada only allows you to carry a maximum of TWO credit cards...so, if you have another Amex CC product (Airmiles, Blue Sky, SimplyAmex, Holt Renfrew), then you might be in a sticky situation when you try to self-refer from the Biz SPG to regular SPG. This happened to me once before, but I found Amex to be very 'accommodating' to my needs...again, though there are nay-sayers out there, I DO firmly believe that having a GOOD relationship with Amex pays off in the long run, when it comes to churning their cards.