First of all, Ragnhild could not have been a better host. She was incredibly responsiveness to messages and made special arrangements for our key pick up as our flight arrived quite late at night. Superb service!
The apartment itself was ideal, really modern and probably the cleanest place I've stayed (AirBnB or hotel) - very impressive. Whilst being reasonably compact, it makes very good use of the space and has all the facilities you'd need for a short or long stay.
The location is 10 minutes walk from Central Station and perhaps 5 minutes from a Voi electric scooter pick up point. (Highly recommended BTW - great way to get around Oslo!)
Service and accommodation is excellent and when we are next in Oslo I would stay again.