I stayed here with my 3 children ages 16/14/10. It worked great with plenty of room for everyone. Apt. was clean. The location is great, especially for short stays in Oslo because it is walking distance to so much. Easy to walk to the boats / ferries (15min), as well as very easy walk to Grünerløkka (5min). Its a half block away from a busy restaurant and bar corridor which was great to be near, while also not having any issues with street noise as the apt was very quiet. Goran was very quick to respond with any questions we had too.
Highly recommend!