We're going in 10 days and we've got 6 Quick & Casual vouchers and 2 Premium lunch vouchers. We're 2 adults and staying for 9 days.
We chose to do the vouchers because they were a good option when considering where we wanted to eat.
My DH wanted to eat at rainforrest Cafe, We have done that before and he liked their food a lot. Last time we were there he was contemplating ordering the steak and lobster meal, but chose the steak, promising to try the surf & turf next time. With that in mind the premium lunch vouchers became a good deal.
The last two times we've been at WDW we have stayed at CSR. We really like the food at the pepper market, but recognize that for a "food court" it is expensive. We're planning to visit to eat this time, and therefore the Q&C vouchers is a good deal.
I could continue like this. It all comes down to where you want to eat, How much you eat (food sharing) and when you eat. If you do the main meal at lunch you can get a lot of value from the premium vouchers IF you chose the more expensive restaurants. Depending on where you usually eat it can either be a way to save money or a way to eat at some places you would normally not choose.
We plan to do about half and half. Half the time we plan to use the vouchers and the other half the time just paying at the time or prepaid like the CP.
So whether you can save money or not depends on what your original dinner plans were - the vouchers are only a good deal at some (and not even the majority) of the restaurants.
Helle