I've been using instacart for 8 years. I initially gave them 4 stars, but I'm updating it to 2: 1) when changing the payment type, you're presented with a green button to place the order. That doesn't update the card. 2) if an item isn't listed as low inventory, the option to select replacements is buried somewhere it's buried deep in the app. 3) instacart has to find a way to interface w/ a stores real-time inventory. Too often I'm told that the store doesn't have an item for basic items.