We used Garden Grocer for our last trip to Disney. My three nephews are big snackers and we picked out a few of their favorites to have in the room. Turns out that the Yacht Club doesn't have a marketplace, so it was a life saver to have our food delivered.
Easy to navigate. Wide variety of products like any grocery store. And very simple to add-on even after original order is placed. Water quite pricey but everything else very comparable to your local grocer.
Super easy to create my order and loved having it arrive in my room shortly after our arrival! Thank you for making travel and snacking with three kids so much easier.