Me and my friends had a great stay at Marianne's place. She was very friendly and gave us some tips for our stay. Also, we had some problemes with our flights and arrived later, she was really flexible and we didn't had any problems with the Check-In. On Sunday we also could stay until the late afternoon, it was perfect for us :-)
The room is nice too, the furniture is modern, it's big and bright. Everything was as described. Next time in Oslo, I would stay again at her place :-)