Good selection of items and delivery was on time! Saved us a lot of money by letting us eat breakfast in our room and have drinks and snacks there.
I wrote a brief review of Garden Grocer here: http://www.lovelogicandlaughter.com/2014/06/disney-tips-and-tricks-disney-world.html
We definitely recommend using this service. It's very quick and easy to use, helped us especially as we could not drive out here; we were able to order items that we couldn't carry from a supermarket. The variety was decent and the wholesale goods were great!! Will use again in the future I am sure!