If you are debating....use them! It was great. The food was delivered by bell services to our room within 5 minutes of our arrival. Having snacks in our bag at Disney was fantastic and made everything easier. Snacks in our room, especially fruit, made me feel good about what the kids were eating.
The cost of food I ordered from Garden Grocer was remarkably cheaper than any food on our Disney resort. Plus, we like Pepsi products and Disney only has Coke. :) I recommend it 100%.
The website was easy to navigate through - the prices were not outrageous for the service provided. The groceries were fresh and at the service desk at the time of our arrival at Disney resort.