Some shops in Japan has another combination of automation.

There is a cashier that scans your items as normal (from one basket into another basket) but each cashier station has two automated pay stations (they can also be shareD).

Once your stuff is scanned the cashier sends you to one of the stations with your basket and you pay ther. You then pack you bags in a dedicated packing area.

It removes the frustration of dealing with scanning yourself. Paying is quick and simple and a separate bagging area (which is std in Japan to be honest) ensures no bottle-necks.

I gotta say I like this system a lot