We used Garden Grocer online ahead of our arrival at Walt Disney World. Our delivery was awaiting our arrival, with no hitches whatsoever. I would thoroughly recommend their services.
We have to fly to Orlando because we live too far away to drive. Garden Grocer makes it so easy to have snacks in the room without spending an extra hour (or two) looking for a grocery store to buy some. The prices and delivery fee are quite reasonable. At our Disney resort, the bell services delivered the groceries to our room after we called the front desk, so we didn't even have to carry all those grocery bags! The website has great choices and an easy way to find the products you're looking for. Everything is paid in advance, so one less worry for your vacation. I will use Garden Grocer every time I come to Disney World in the future.
A must if you are going to Disney with kids!