Went for a overnight stay with the gf. We were greeted by friendly staff. We got a room at the 6th (top) floor with a great view. The room was sort of what to expect. Would rate the bed 4/6. I have slept in more comfy beds, but it was not bad either.
Found a couple of hairs from earlier guests at the walls in the bathroom but this was really the only downside of our stay. The breakfast was at the restaurant Egon and had a wide variety. Try the croissants!
The hotel is really central and is close to Oslo City shopping center, Oslo opera house and much more. Which was really great. Destinations out of walking distance can easily be reached by bus, train, train or renting electric scooters.
We wanted to sleep in and spend the next day in Oslo as well the the hotel made this easy as we extended our stay from 12 pm to 8 pm for only 250 NOK (approx. 28 $).
All in all. Good hotel, good staff, good views, would stay there again, would absolutely recommend.