Grocerygateway you select like white bread and hope that yoir brand and brown bread doesn't come. You select apples and they are out and will give you pears.
InstantCart felt modern. You select the exact brand size. When the morning comes you will see the items the person found in real time on the app. The useful part was when an item is not found the delivery person will select a replacement that you see in real time and you can reject or replace with other items. For those that want a more interactive shopping experience I recommend, feels like I'm on the phone with someone as they shop.
With Ocado I select a time slot and they know what will be available with very few substitutions. Definitely not apples-for-pears level.
It's up to them to tune. They could make it exact(don't overpromise any stock) but then be stuck with unsold stock due to customers amending their orders. Or they can oversell slightly and offer refunds or returns for unwanted substitutions, which is what they do.
Grocerygateway you select like white bread and hope that yoir brand and brown bread doesn't come. You select apples and they are out and will give you pears.
InstantCart felt modern. You select the exact brand size. When the morning comes you will see the items the person found in real time on the app. The useful part was when an item is not found the delivery person will select a replacement that you see in real time and you can reject or replace with other items. For those that want a more interactive shopping experience I recommend, feels like I'm on the phone with someone as they shop.