I traveled to Oslo in May with my mother, and Caroline and Cesar's home provided us the perfect alternative accommodations we were looking for: a quiet, pretty neighborhood outside the city center, close to nature, with a great view and wonderful hosts. A bit far if you only have a day, but perfect if you're not in a rush and looking for something tranquil and away from tourists.
Here are some things to keep in mind:
1. The apartment is small, and although it is listed as having two beds, the pull-out armchair would have taken up too much space, making it impossible to walk from the bed to the bathroom. I would say this home is best for a couple. That said, the actual bed was big and very comfortable, and therefore easy to share even if you're not a couple.
2. It's a bit tricky to find the house once you get off the bus, especially if you don't have access to google maps or phone while you're in transit. I recommend writing down/taking a screen shot of the directions before heading to the house.
3. Just behind the house is access to Ekeberg Park, and a forested trail that runs along the ridge with beautiful views of the fjord and city all along the way, and access to Ekeberg Sculpture Park. I highly recommend taking this hike!
4. There aren't any groceries or cafes in the neighborhood, and there's no ticket machines for the bus; buy groceries and plenty of bus tickets before you leave downtown. There's a cheap grocery store right inside the bus station.