5/24/16 Went to the Safeway in Kapaa. The lines were pretty long, but one of the self checkouts was open, since I only had five items I decided to do it.
I had my own bag. It could not register its weight. Five times the override clerk had to say it was OK. And a bottle of Cinnamon whiskey so they had to do the age thing. The red cabbage didn't have a bar code and was not on the list of fruits and vegetables. The override clerk was gone, so we were stuck until a new clerk showed up.
Seven overrides to buy five items. My perception is that anyone with a lot of items is going to steer clear.