I stopped using them. It’s always something, requiring me to wait for and deal with people.

The rack with the mobile scanners is full, and scanner not in the rack is not paying, so flag someone to deal with it.

The thing double scanned an item, and it takes someone from the shop to remove the scan, so wait and then explain.

I had a coupon, but the system can’t deal with those. Again wait and explain.

And because now apparently I’m a trouble maker I get flagged for a random check by the system regularly. Again wait and deal with that.

On average, it turned out to be less waiting and dealing with people by getting in line at the regular cashier.