Very easy to use, prices are a bit higher than I pay at my grocery store, but for the convenience of having it delivered right to you and even refrigerated until you arrive it is a no brainer...you can save money off by making your purchase a few weeks/months in advance...and clearly most people know well in advance that they are going on vacation. So it should be easy to plan ahead and save if you know about it!
We arrived in the evening and our groceries were waiting for us, however we had reservations in Epcot so we went to the reservation first. When we returned back to the hotel, they delivered everything. It is definitely a service I will use again.
Garden grocer was phenomenal! We saved a ton of money while at Disney as groceries were delivered to our hotel and the customer service was excellent. Thanks!