As Jan himself explains it is an ideal place for one night (for example before leaving what was our case). A small room in Jan`s flat, without kitchen, quite cheap and very near to the Oslo central railroad station, so it takes you very little time in the morning to get to the train away or to the Oslo airport). The kitchen is unavailable but you can make a tea or coffee in your room. Although located in the centre near the station it is not loudy, maybe because it is in the 7th floor. Also Jan does not make any noice so it was very calm place for sleeping.
Jan was a very helpful and communicative host and I can recommend him to other guests.
Jan