Great place to stay. In the neighbourhood of Grunerlokka with direct access to trams and buses. We arrived to Oslo on the train and were able to use 12,13, and 11 super easily to get to and from the area to the city center. We actually walked from the apartment to the city center quite often and it was about a 20-30 minute walk depending on what area you walk to. The food, coffee and shopping places are great in this area as well.
The apartment itself is on the fourth floor with only stair access. The apartment is very spacious, with great amenities, very modern bathroom, and a relaxing atmosphere. The decor is great and thoughtful. I would recommend staying here if you’re looking for a place outside of the hustle and bustle of the city, or for a nice clean place as well!