Garden grocer is so incredibly efficient - they take one less stress out of Disney park planning when traveling, especially with young ones. Our impetus to use them was to save a little money at the park, if your family wants more than one 'snack' a day your jammed into paying 2.50 for a bottled water. I chose several of the 'Store Brand' items (specifically for cases of water and paper goods) and it proves far more reasonable than others. We highly recommend garden grocer!
The convenience factor of using Garden Grocer when visiting Disney World is wonderful. Since we do the meal plan at Disney we usually only order drinks. No need to waste your time going to a grocery store in order to have the convenience of having plenty of bottled waters, sodas, and even wine and beer. You do pay a premium for the service, but it is still much more economical than buying on the Disney campus. We have used the service twice and orders have been accurate and on-time. Will definitely continue to use Garden Grocer on future visits to Disney World.
My order was delivered to my cabin even before I checked in! It was great to get the kids some milk and a snack right away!