I have a child with special needs. Traveling with rice milk, extra paper towels, making sure I have water for his g-tube etc. takes up a lot of space, and adds weight, to the suitcase. It is so nice to arrive at your destination and have your basic supplies waiting for you. (I used to mail items beforehand, but this was cheaper.)
So convenient. Groceries were with bell service when we arrived at our resort, there wasn't anything else I needed for the week. Great service when you don't have a car.
There's nothing better than snacks and drinks in your room while on a Disney vacation!! Garden Grocer makes it SO easy!! We use Garden Grocer for every trip and I also recommend them to all of my clients (I am a Travel Agent who specializes in Disney Destinations)!!