We ordered (from Canada) online to make sure that we had cereal, milk, cream and snacks for the kids while at Disney and it would have worked out great but Disney Riverside employees "lost" our groceries, when they "found" them they replaced the dairy with their own industrial brands (YUCK). GG did everything they could to help, even calling and making sure that Disney employees found our items. I will use GG again (and again, and again).
Garden Grocer was an amazing and pleasant experience. We did not have a car, and stayed on Disney property. This was a great way to get some items for our room and we did not have to spend time getting a cab and shopping for ourselves. The delivery fee is a small price to pay for the time is saves and the money saved in cab fair even with Uber. Any questions we had were answered quickly, they confirmed our order after it was placed, and as soon as it was delivered we got text, email and a phone call, which I had chosen all methods, expecting one to not happen, but all did. I highly recommend Garden Grocer for your vacation shopping, or if you cannot easily shop for yourself.
I actually had a discount code for free delivery to another grocery delivery site, but went with Garden Grocer because the website was easier to use and also we didn't have to be at the hotel room to have the groceries delivered. I'm so glad we did because it really was easy to use and delivered on time.