Basically paying for a card to get a full "loaded coupon book" that expires each month. (Credit-Dan.)
But yes if you utilize the benefits of having an Amex card and remember to use your coupons each month, then yes worth it. Though I find myself buying and spending more than I would just to justify the card perks and place orders I otherwise wouldn't have done. So it's a waste of my time and money having this card in my case.