I stayed at Natasha's while visiting friends who live in the city.
If you are looking for somewhere convenient to stay while exploring Oslo for a short time period the flat is ideal.
It's clean,warm ,comfortable and well located (close to the Munch Museum and in walking distance of centre and lively areas )
Although I didn't meet Natasha in person she communicated regularly via email and was a hospitable host.
Tip: If you are not familiar with Oslo ask for clear directions to the accommodation.