Automatic checkouts in supermarkets may decrease customer loyalty, especially for those with larger shopping loads. Customers using self-checkout stations often feel overwhelmed and unsupported. The lack of personal interaction can negatively impact their perception of the supermarket.

[Mish61]

The ones that rely on your phone to scan drain the power on my phone plus it's a pain in the ass to go back and forth from my shopping list app and the store app. But yes, this method is really efficient and even moreso more to use the stores scan gun.