Mathilde's flat is located in a quiet area approx. 15 walking time from city center (good bus connection with the 37). There is a small grocery just around the corner and 2 supermarkets nearby. A good bakery when you cross the cemetery. The food court Oslo Mathallen is just down the hill.
Apartment is big enough for 3 persons. Kitchen is super furnished. Beds are comfy. Bathroom is a little tiny but you get used to it in Scandinavia! ;-)
Mathilde gave us all the informations we needed and was very responsive to our requests. A very good base to explore Oslo!