I would definitely recommend Garden Grocer. They called to confirm, I received everything I ordered, and it was in my room when I got to hotel.
It was great!
I found out about Garden Grocer by chance. I was scrolling through the Mom's Panel on the Disney website after booking our disney resort vacation. I ordered before we left and actually ordered again during our stay. The grocery prices themselves are fair as is the delivery fee. They are quick to confirm and very pleasant over the phone. Delivery was fast and within in the first hour of the 3-4 hour window. I highly recommend and will definitely be utilizing this amazing service on all future family vacations.