The whole process of check-in and check-out was very straightforward, Ingun always responded quickly to requests and helped us find everything well. The apartment is nice and very well located in Frogner (one of the nicest parts of Oslo) you can quickly get to the bus station and take the bus to the city center in a few minutes.
The stay was very pleasant, but the apartment has some inconveniences that make a long stay rather less recommendable than a short one. For example, it is practically impossible to shower without flooding the bathroom.
But e.g. the bed was very comfortable and the kitchen had everything needed for a couple of days. I would definitely recommend the apartment for a short city trip.