My husband and I, along with our two friends, stayed at Dorthe's place for 3 nights this past November. She was traveling out of town when we arrived, but arranged for someone to meet us with the keys and give us a quick rundown of her digs. Dorthe was responsive, helpful, and friendly in all communication prior to our trip. She left us a bottle of wine for our arrival and some breakfast foods for our first morning. Her place was clean and plenty big for the four of us. Our one friend is rather tall and preferred sleeping on the pull-out couch than climbing up to the loft, but it would have been just fine for someone a little shorter and the perfect perch for a child.
There are only a couple of things you should be aware of prior to your arrival. First, there are quite a few stairs to reach this top-floor apartment. My husband and I had packed backpacks and were fine making the climb; our friends, on the other hand, had packed large suitcases each and had to take a break or two on the way up. But, the view of the courtyard from the balcony made the climb worthwhile. Second, we ran out of hot water the first morning. After washing breakfast dishes and three people showering, the last guy was out of luck and had a cold shower. We each conserved the hot water the next two days and didn't run out again.
We had a wonderful stay in Oslo. We walked everywhere. We ate, drank, and danced. We are already planning on a second trip in the summer one year soon!