Hi, I flew VNO-CPH-KEF on SAS Plus (both segments marketed as SAS Plus on 117, aka SAS ticket stock) yesterday.
VNO: fast track, lounge allowed, all as usual.
VNO-CPH (operated by Cimber): standard SAS Plus service. Economy seats + rude SAS lady sub-human treatment and tray with some edible salad. The lady dropped the food tray without saying a word.
CPH: no SAS lounge despite being said on SAS website it should be provided - gate simply rejects and another rude SAS tradeunion-guarded person simply said "you have to leave this area NOW" with giving no explanations.
CPH-KEF (operated by Icelandair): I was seated on row 4. It is regular business class seats 2-2 abreast on 757 but only economy food service. Not sure if internet was free of charge as I blacked out early into the flight.
Hope this helps.