It is great!
We just traveled to Florida with a baseball and softball team from our local high school. We try to save money for the week by supplying each room with breakfast items. This year we used Garden Grocer to help with this process. When we arrived at the resort all items were delivered right to my room and it was easy to sort the order for each of the players rooms. We will definitely use this service on our return trips to Disney.
We saved so much money on snacks at Disney by using Garden Grocer. It was extremely helpful!