Self checkouts were all the rage here for awhile. I wouldn't use them, if I'm in a full priced store I'm not going to do the work unless they pay me. I'd rather they hire a real human to do that, they need the jobs. If I'm in Aldi I'll gladly pack my own groceries, but not at a Jewel with higher prices.
The Jewel was paying someone to monitor the self checkouts when they were hardly used. Finally they tore them all out and and put in a bunch of quick checkout lanes staffed on demand by real people. Those are much used.
It will be interesting to see if this Swedish store works out.