Kristian is truly a superhost - his responses were lightning fast, and everything was perfectly organized for us. The apartment is spotless, one of the cleanest places I ever stayed in. And everything inside the apartment is full of character and charm. Of special note: (A) great high-end coffee machine; (B) skylights above the bed that you can open at night for fresh summer air; if it starts raining - the skylights close automatically! (C) An amazing balcony where you can sit in the long evening hours with a cup of tea or a glass of wine, enjoy the views of the city from the top floor, and even catch a glimpse of Oslofjord in the background.
Location wise, Kristian's place was perfect for us. It is in the heart of quiet residential district, yet just a few min walk to all the restaurants and cafes of Grunerlokka, Botanical Garden, Munch museum, etc. It is only a 10 min walk to the Central station - very convenient for airport trips or any out-of-town excursions. In 15 min on foot, you could reach Karl Johans gate, and in 30, Aker Brygge. In other words, super convenient to a lot of Oslo attractions. We had a rental car, but despite Oslo's tough reputation for parking, we immediately found a spot right in front of the house, paid for it with an App - and voila.
I highly recommend Kristian's place, and hope to stay there again on my next trip to Oslo!