I only had a limited time of one night staying with Marthe as I arrive in the late night and leave in the early morning，but I could say Marthe's house is very well decorated in Norweigian style and I'm sure it will look more amazing in the daylight：）It is in the city centre and you can take off at Nationaltheatret station，one stop after the central station if you come from the airport like me. The room is cozy as in the picture but has everything needed for a single traveler，the bed is comfy and the shared bathroom is very clean and easy to access. Marthe is very nice she helped me with my printing problems which I am mostly grateful for. I would definitely recommend Marthe's place for travelers who want to explore Oslo and I hope next time I can come and stay for a few more days ：）