We stayed at Carina's place for 3 nights, and it was very nice. We arrived very late to Oslo on the first day, and she didn't had any problem at waiting for us to arrive. The house (and the room) is very big and spacious, and it's located in a very calm neighborhood, which is very easy to reach using trains/buses. Carina is very nice, and will provide you everything you might need. We would surely stay there again.