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!
We have two kids under 4 and take breaks from the Disney parks while on vacation. It was perfect to come back and have food in our room. We use Disney transportation so on our last vacation we spent so much more money by getting our snacks and beverages from the dining hall. Prices are great and the order was there when we arrived.
We have used Garden Grocer for all of our trips to Disney World. It makes life so much easier. Would highly recommend.