We three had a lovely stay at Irina's. She was very kind to us, provided great information on how to get to the flat, and included all sorts of useful things in the flat, like ponchos in case of rain and maps of the city. The flat is close to both bus and tram lines, making it easy to explore many parts of Oslo. The beds and other furnishings were comfortable, and it was a cozy place to stay. I would definitely recommend staying here!