I have stayed at Merete's place only one night, arriving late. She has been really kind and welcoming. Also very accommodating for check in and check out. The room is spacious, light, and extremely quiet. You'll find two single beds, which are comfortable. And a large desk. The lounge and kitchen are also large and light, with a terrace overlooking Oslo rooftops. All simply, Norwegian, stylish (in my own appreciation).
Really easy walk from the central station or city centre, and well connected through subway at 4 minutes from home.