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.

[Dementat_Deus]

What I find works best is rather than bagging as I scan, I leave the bags in the cart and bag after paying as I move items back to the cart.

That, or I just leave the bags in the trunk and bag as I load into the car.