We loved our flight on SAS from Chicago to Stockholm in August 2013. We upgraded to Premium Economy, and it was well worth it. I'm tall and need the extra legroom. The upgrade got us into the SAS lounge at ORD, which was welcome on our long layover from Portland. Coach class on the SAS A330 was full, but we had the entire Premium Economy cabin nearly to ourselves. Food and service were outstanding.
Photos here.
One thing that we noticed at Arlanda ... gate assignments for connecting flights are not posted until the airplane actually taxis in. It's a big terminal with several different wings and a long walk from one end to the other. We had no idea where to meet our connecting Lufthansa flight to Munich, and no airport or airline personnel could tell us. Unlike US procedure, where gates are usually announced hours in advance (subject to change, of course), the gates are not pre-assigned, but determined by Air Traffic Control when the airplane arrives. Gates are not dedicated to specific carriers. Finally the gate was posted just before boarding, and everybody hustled over to that gate.