Read about garden grocer on Disney blogs and specifically how beer is not regularly served in the park, and is very expensive. I ordered some groceries a few days before my trip, received a text when my items were delivered, and had them brought to my room as I arrived. The minimal delivery fee is well worth it when keeping in mind the considerable upcharge for items in Disney parks, especially beer which is $8 for 1 can at my resort when I paid around $10-11 for a six pack at garden grocer.
We had scheduled our delivery between 2-4pm. Our flight was delayed and when I called Garden Grocer they were very accommodating. I called them back once we were enroute to the hotel and they arrived while we were checking in.
We love being able to save money on our park visits by making our own meals without having to go offsite to shop. This is an excellent service and our groceries have always arrived on-time and in excellent condition!!!