We used the dining plan at christmas and it took some planning and alot of menu reading to make sure we used every dime.
We did do BB and 4 character meals using our dinner vouchers as this turned out to be the best way to NEVER go under our largest voucher amounts. The 1 premium character meal voucher went to GK and the regular meal tickets covered the other three when we added a snack voucher or two. We were never under the $ figure on the voucher and we used some of the $5 snack vouchers and 1 extra childs meal ticket to make up the over difference at BB. Several times we were able to get 3 CS meals or snacks using only 2 vouchers and if we were getting snacks and we were slightly under we usually bought a bottle of water and stashed it in the backpack for later paying a little out of pocket so we could not lose the under money. When we ate at TP grill in DCA we had "extra" money on our vouchers and bought one of their kid's snack packs (cheese, crackers etc) and saved it for snacks while watching Fantasmic later. Total out of pocket for overages while dining or snacking & tips (at TS if you are under you can designate the difference as tip) was $22.50 for 4 1/2 days.
It was very nice to know the money in our pockets was all designated for souvineers and fun..the food was prepaid.
It can work and we did not lose a dime but you have to be very aware. Plan your meals as best you can..we did deviate a bit but not much.
Use of the Dining Plan did mean we ate at more TS restaurants than usual and sometimes bought things like the "extra" water bottles etc that we likely would not have bought otherwise.
As we did this last trip with the dining plan our plan for the next trip was always to put the $ value of the dining plan on a DGC for our next trip to see if we did better or worse that way so I did ask around who did/did not take gift cards. Inside the parks and hotels (excluding DTD) all the restaurants accepted DGC and the only snack cart that did not was the ice cream vendor near ROA as he did not have a cc machine (did not ask if this was normal or if it was temporary should have I guess) all the other snack carts accepted them.
The dining plan IS NOT accepted by restaurants or snack vendors in DTD neither is the DGC so plan accordingly if you want to eat in DTD.
It is accepted at every establishment that sells FOOD in DL, DCA, DLH, PPH & GCH. Be aware anything like candied apples, tigger tails etc IS NOT FOOD it is MERCHANDISE therefore it is not covered by the dining plan but is covered by a DGC.
As I said before our next trip we are putting the $ value of the Dining Plan on a DGC. This is an experiment to see what we actually spend on food & snacks when we are not restricted by the amounts on the vouchers. It could be more, It could be less time will tell. Whichever one turns out to be the better value for my family will be the one we use after this as I do like having the food pre-paid before the trip..it worls well for us but we really do not eat in DTD and I know alot of people do niether option will cover DTD dining.
I do think Disney needs to makke the vouchers a better value..give you some boost for pre-payment..even a 10% discount would be nice. I am sure many more people would use the plan and it would not be so much work to make sure that snack that was 50 cents less than the voucher didn't compound over the length of your stay to end up losing you money.
Well that's my 2 cents...sorry it was so long.