Here's our experience with the DDE card. We are just a family of 3 (DS is 10 so the DDP was NOT a great idea for us since he's considered an "adult"). Anyway, it is valid for 1 year so we purchased it in time for our weeks vacation last August. With our discount it was $65. We eat a lot of CS meals for lunch & often for dinner and it is not good at a lot of CS places. We used it for a character breakfast and at BOMA (with lots of drinks) and all over the AK park. As much as we could use it, we did. At the end of the week I added up our receipts and we had saved $55. OK, ALMOST broke even with it on that trip. We just went again for 4 n. over MLK weekend and were not able to use it nearly as much. It seemed every place we picked to eat did not accept it nor did they offer any other discounts. We just picked the wrong time & place to eat - sometimes it's just hard to plan ahead every meal. The only time we were able to use it was for dinner at Whispering Canyon. We saved approx. $15 I think - so now we have finished paying the $65 fee and are $5 ahead. We will be going again in July and will be able to use it some more - but we'll only be there for 3 n. and I doubt we will get remarkable savings from it - we will probably plan to go to BOMA again tho and that will easily save $20 + probably be able to use it for lunch at the AK park again.
IF we were a larger family or if our 2nd and 3rd trips were a little longer it would've been a real deal. We just aren't a large enough family and don't eat enough table service meals for it to have been a fantastic deal this time around - but I wanted to try it to see how it would work out. We are hoping to take an extended family vacation with up to 16 people in 2009 and while I think it will be hard to coordinate that many people together for meals (and I'm not going to try) I think that there will be plenty of opportunities that we can use it since it's good for the entire table or up to 10 people I believe. It could easily pay for itself in one meal. So I think that we will purchase one again for that trip.