I've been using Whole Foods app for grocery delivery for a little while, and I tried using the QFC one the other day, figuring Amazon needed some competition. It was a complete joke. Half the items in the store said they were only available for pickup, not delivery (why?), and there was no way to filter for delivery items only. And then even when I filled my cart, when I went to check out it removed half the items in there because they were out of stock or because they weren't actually available for delivery after all. Why did you show them in the first place? This app was worse than having nothing, in that it wasted so much of my time.

It's hard to see how Amazon will ever be challenged when the competition is so bad.