Great location, very friendly host, fully equipped kitchen, full privacy, very safe & quiet neighbourhood, very clean apartment, easy & quick entry, you can't go wrong with this place.
Pro tip: if you get there by flight don't buy the "fly train" instead buy the cheaper train (~ 110 nok) near the airport exit. At the oslo station move first in the direction of the Opera and then use the gps location, 15 mins walk to the bnb.