We stayed at Disney's Wilderness Lodge. The process was so easy! When we arrived, our food was with Bell Services. They had kept the perishables refrigerated and they brought it up to our room after we checked in. It was especially useful since our children have food allergies.
It was so nice to check into our resort at Disney and not have to worry about snacks for the kids. The groceries we ordered were there waiting for us which gave us the time to unpack and get situated while the children had a nutritious snack while waiting to hit the sights.
We have used garden grocer for years. It is perfect to add food/drinks to your room for packing things for pool or parks. Saves a lot of time, effort, and although deliver charge seems like it adds a little it saves you in the end.