Fantastic, brand new flat. All amenities included. Very well connected to the city centre by Oslo's excellent buses services.
If you get a day or week ticket, can travel all across Oslo, hopping from bus to trikk (tram), T-bane (the tube), tog (train) and I think also the båt (boat) from Aker brygge to the nearest islands, for example Bygdøy, if I'm not mistaken.
At the upper road of flat there are 4 bus lines that take up to 10 minutes to Jernbanetorget/ Oslo S, at the lower road, there are shops, gym, supermarket, etc., and another bus line that also takes up to 10 minutes to get to the centre.
Helge is a kind and helpful young gentleman, and nice to talk with.
Highly recommended.