We've done DP and DxDP several times, as well as DDE/TIW many times, and we find a bigger savings with TIW. Here is why:
1. Kids - Kids are young (3 and 7), but they eat adult meals (usually share), and have been since babies. They have never eaten a peanut butter and jam sandwich, nor do we eat hot dogs. They eat: steak, chicken, rice and fish.
2. DP is too restrictive - we don't eat desserts, nor drink pop. So, we would frequently not order desserts. Kids love milkshakes though, and they can get that as a drink with TIW, or, order appetizers.
3. DxDP - too many ADRs, and way high tips for 3 TS meals per day. We also don't use the refillable mugs, as we don't drink pop or coffee. We did find a big savings when getting DxDP, as we ate 3 TS meals per day, but it was too much running to ADRs.
4. Alcohol - we do
not drink alcohol, so despite some people saying the only way to save is by drinking alcohol, no, it's not.
5. CS - we do not care for CS meals at all. In the 2 weeks we are at Disney, we are lucky to eat 3 or 4 CS meals, and some of those are a quick breakfast.
At this point though, we are restauranted out! We've BTDT with almost all restaurants, including Signatures, so this trip, we ate even more in villa, and we plan on eating even more in our villa next trip. We will still get TIW (unless they raise the cost), as we have a few character meals planned, as well as our must-do restaurants.
We like the flexibility that TIW gives, as well as saving us money, Tiger