Me and four friends had a wonderful stay in Oslo, and that was partly because of this wonderful place. Oistein and his wife were very courteous and understanding. They helped us a lot when we had questions and always answered fast. The place was very clean and had lots of room for all of us. The rest was as described by Oistein. This was a perfect AirBnB experience for us, especially after the worst AirBnB experience in Gothenburg.
As described a little breakfast is included as well, which just was very nice of them. Keep in mind that you need a ticket for public transportation to get to the place though (it takes about half an hour).
All in all, a wonderful stay.