Jofrid's place is located pretty centrally in Oslo. The subway is 10 minutes walking (there is also a bus stop near by), that will take you to the city center quickly.
You will have your own room with a shared bathroom and you can make use of the rest of the living room and kistchen as well.
Jofrid is kind and communicates quickly. She will give a detailed explanation how to find the appartment and also has a whole binder with brochures and tips for your stay in Oslo and Norway.
If you are visiting Oslo, I would certainly recommend Jofrid's place.