We used Garden Grocer for our most recent Walt Disney World vacation. Prices are a little higher than a normal grocery store. However, the convenience of not having to find transportation to and from a grocery store, the saved time by not going outside of the resort or parks, the ease of having it delivered, and the confirmation of delivery was beyond what I expected!
We've used Garden Grocer twice for trips to Disney. It gave us a chance to eat breakfast in our room, have fruit, snacks and water to take with us to the parks, and saved us a fortune over what we would have spent in the parks. Our groceries were waiting at the hotel when we got there and a bellman brought them right to our room. Very convenient!
Ordered weeks in advance of our trip, arrived to find our order already delivered with cold items already stored in fridge/freezer. Order was exactly as expected and super convenient. Will definitely be using Garden Grocer again for our next trip.