I experienced self baggage check in ARN last week taking a SAS flight to CPH. It was an easy process, other than getting the hang of attaching the tag properly to the bag and remembering to take my claim check. It certainly was quicker than waiting in a line of people who had more to do than check their bags.

Also, interestingly, no one checked my ID at any point in the process. I boarded the flight without proving my identity at anytime between arriving at the airport and boarding the plane. I simply used the boarding pass that I printed at my hotel to check my bag and enter security.