The card saves a whopping amount of cash!!!!
I haven't added up the total amount we saved on our 8 day trip, but I can tell you that on one meal for 3 at Flying Fish the 20% saved was 40 bucks!!! I just haven't gotten to it yet, but I plan to total up exactly how much we saved...this would not include the roughly $80 we saved (after recouping the $50 cost of the card) on our June trip!
So, it's well worth getting the DDE!!!