We used We Go Shop this June when we were staying at POFQ!
There is a place on the order form where you can tell them at what time you would like for them to deliver, and they will confirm that with you. They will have your phone number when you are at Disney. They like to have a cell phone number. They delievered my items ON TIME!
They phoned me before they arrived on my cell phone. The person delivered the items to the room. I did not have to wait at security.
I thought I had a lot of items, but he said that he has delivered a ton more to people staying at POFQ.
The good thing about We Go Shop is that you can be specific with your order. We had them shop at the Super Wal Mart for our food. It saved us time and money for if we had shopped at another grocery store the prices would have been higher. So I thought the delivery charge was well worth it.
They shop the same day so it is good. For example, I ordered Sara Lee turkey and Land O lakes cheese from the deli, and the date stamped was the same day they were delivering it to me.
We also got things like the croissants that you can get at 10/$2.50. I think it does not hurt to know what Wal Mart carries or at any other store you will have WGS pick up your items. that way you can easily make out your list.