We had a great stay at Kari-Anne and Inge's apartment! It was very clean and comfortable and exactly as they described. The location was good - in a nice, quiet neighborhood close to stores and restaurants, as well as near public transportation that takes you right to the heart of the city. The hosts were also quite accommodating - our flight arrived very late but getting the keys was not a problem and they frequently checked in on us to make sure our stay was going well. If you are unable or unwilling to climb many steps, this might not be the place for you as it's not on the first floor. However, if that's not a problem for you the view from their unit is worth it and I would definitely recommend staying here on your visit to Oslo.