The card is accepted by places that are owned by Disney with the exception of maybe the balloon vendor on Main St. and a few of the other "mobile" vendors.
Just an FYI, the next time you get a card from Disney VISA, put the minimum on it when you request it. They require that you have at least $10 in rewards dollars to transfer more to the card afterwards. If you order a card today and leave at least $10 untouched, you can transfer that and any rewards that you accrue on the next statement. If you transfer it all right now, then you risk having a few rewards dollars that you earn between now and your trip that you cannot transfer because they amount to less than $10.