I wrote a brief review of Garden Grocer here: http://www.lovelogicandlaughter.com/2014/06/disney-tips-and-tricks-disney-world.html
We have used Garden Grocer for two trips to Disney World. Ordering was super easy and our groceries were waiting for us at our resort when we got there. Love this service and will definitely be using it when we go back!
Food, snacks and beer waiting for us at the resort! What's not to love!