Sigurd' apartment is very convenient to the main part of Oslo and a very short walk to the train station.
It was perfect for my wife and I to use as a base of operations as we traveled around the city and parts outside the city.
As one of the other reviewers mentioned, the apartment building is sandwiched between two office complexes so you are looking at office workers on both sides of the living room with no drapes or privacy. A little disconcerting if privacy is important. One thing to remember, if you are travelers like us, you leave in the morning and back later in the evening. The workers have gone home for the night. No problem.
The convenience of the apartment location makes up for the lack of privacy.
If back in Oslo again, I would stay at Sigurd's home, if he would let me.