Martine was very accommodating and replied quickly (less than 1 hour) to my messages. The apartment was, for us, a bit far from the city center. It took us around 30-40mins to walk from the apartment to Aker Brygge, but the area is quiet so we had no issue with that. The bus/tram station is just a 4-min walk from the apartment, so you always have the option to either walk or use public transpo going to and from the city center. There are also restaurants (6 to 8-min walk) and grocery stores (12 to 15-min walk) nearby. The apartment has a kitchen and a separate laundry area. Overall we had a great time at Martine's.