we have used garden grocer. It was very reliable and right on time. All the food was fresh and the produce and meat selected was excellent!! Saves you lots of time, and they deliver it right to your room The DVC website has options under planning your vacation, in which you can place a grocery order from your resort in advance. However, they tend to be very pricey and some resorts have limited selections. If you intend to stay for more than a few days, then I would recommend going through a grocery delivering service.
We used gardengrocer this past March when staying at FW and were very please by their service. As we arrived late at night we found everything to have been put away. Their prices were reasonable and we will definately be using their services again this winter.