We stopped the DDP 2 years ago, mostly because our children got tired of the "children's" menu....almost the same everywhere, and we HATED planning our entire trip around our meals. We seemed to over eat on the DDP. We are not Appetizer/meal/dessert people. We did stretch the QS meals with it by splitting one meal at the Starlight cafe in Tomorrowland (both ribs and chicken for a QS credit) was more than enough for 2 people.
With the PAP this year, we are making 3 trips in a year so we bought the TiW card. Took my wife to V&A and the card saved me $94 alone on that meal, so TiW is more than worth it this time.
The big thing is if you do a lot of TS meals, the TiW can pay off. You need to spend close to $500 for the card to pay for itself, so if you are doing several sit down meals, it usually works out. But everyone is different, so only you can do the math based on your own eating habits.