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!
First time use of service and groceries were at resort upon arrival at 2pm, chilled! Much better than walking from Hess's through downtown Disney to catch a resort boat with a case of water, beer, and other necessities!
It was easy, great variety and was at our resort before we got there. Very easy and I love easy.