We booked this flat more than two months in advance for a friends' trip to celebrate New Year's together. None of us are from Norway so there was a lot of planning, flights, and extra costs involved. Hege cancelled our booking on the morning of our planned arrival, on the same day that we were coming to Oslo by plane. The only explanation I got was "Oh sorry, I thought I had already cancelled".
Luckily we were still home at this moment, in a warm place with WiFi, from where we could rearrange our trip. However, that cost an immense amount of time and stripped us from a vacation day that we would otherwise have spent with family.
We could just as well have already been in Oslo by the time I read the cancellation email, not knowing anyone and without accommodation during the holidays when most are booked out.
I obviously can't speak for the quality of the flat, but I would not book with Hege again as this behavior is incredibly untrustworthy and unprofessional.