We've used Garden Grocer twice so far when we've gone to Disney World. Our grocery order has been at the resort before we even arrive from the airport. We love WDW however; in the long run and depending on the size of the grocery order Garden Grocer is cheaper than WDW. The variety of products is really nice too.
A bit on the expensive side, but I understand why. They were very helpful and made use our order was correct and we were not over-charged due to an oversight.
I spent $200 on groceries and was satisfied with everything I purchased. The fruit was not bruised and was delicious. We pay a little more per item, but the convenience is the trade off. I would recommend this service to anyone.