The place is absolutely amazing. We were four people and it was like having a private apartment for each couple for how big and well structured it is. The flat was perfectly clean, and it is overall beautiful. We decided to have dinner there one night just to enjoy it more.
The place is in front of a very nice park and in a very central area really close to bus stops to the city center and to the airport and full of nice restaurants and shops.
If I ever go back to Oslo, this will be my first choice to stay.