We found the vouchers a great way to pre-pay meals, but found using them a bit of work. You have vouchers for different amts ($5, $10, $15) & you need to figure out which ones to use so you don't lose money on them. You will not get change back if you don't use the full amt. So you're using a voucher to pay a chunk of the tab & then paying with cash/card to cover the balance. The vouchers for the character meals can save you money, but call Disney Dining & get the current prices before purchasing them.
We found putting money onto a Disney gift card was the best fit for our family. We were able to go on allears.net & pre budget meals/prices & then put the money on the gift card. The card could be used for food & souvenirs & we never had to stop & hold up the line trying to get the right vouchers, cash to pay our bill.
For some people, they like the plan, but you don't get any kind of deal on them....so you don't save money using this plan. (and if not really careful, you can actually lose money going this route)