We used Garden Grocer on our last trip to Disney. We had a room with a full kitchen so we ordered some basics to have on hand for our daughter and to have for breakfast. Our order delivered before we arrived so bell service delivered it to our room. Overall we were satisfied - some of the pricing was really high plus the $14 delivery fee but it was still better than paying the "Disney prices"
We saved at least $200 on our Disney experience! We recommended it to our acquaintance whose son had a gluten allergy.
Our groceries arrived at our hotel before we did and were already in our room waiting for us! It was excellent service and having breakfast in our room got us to the parks sooner.