I would only do DxDP if you absolutely want to indulge yourself and have a massive foodie adventure.
I have been on DxDP for my last 3 trips and will be on again in June. Here's why: I go with adults, we eat at about 4 signature restaurants, every meal is a sit-down meal, no QS, and we are happy to order 3 courses each.
It's a glutton-fest AND ONLY WORTH IT if you would have ordered all of this regardless.
I do not think the
DDP saves me any money. I even used the spreadsheet thingy and I think it saved me like $90 at the end of the day. HOWEVER, I use the DxDP for this reason:
1. I pre-pay for my meals. Using the KTTW (or magic bands) and never use my debit card (or have to look at my accounts) is worth it to me. It's "pre-budgeted" which is great for me. I even get a giftcard to pay for tips (which I estimate in advance and use the leftover on the card to pay for souvenirs).
2. I have an excuse to order 3 courses when in the normal world, I would never because of $$ and hunger level. With DxDP, it increases my pleasure on my trip b/c I can order 3 courses and not feel guilty because I already paid for it!
3. Sampling all the different dishes with my (all adult) family and friends is a fabulous experience that only occurs because we are maximizing DxDP.
I love love love DxDP but it saves me little money, so there you go!