I thought it was very convenient and worked perfectly when we stayed at one of the Disney resorts.
The service was just what we needed and was provided just as expected!
I found Garden Grocer when I was looking for a grocery in walking distance to our hotel. It was the answer to our dilemma - staying on (Universal) property without a car. Ordering on line was easy. We got a phone call the next day to confirm, and the food was delivered as requested, in our room when we returned from a day in the park. I would reccommend this to anyone who doesn't want to spend $4 for a bottle of water or $12 for breakfast.