This is a small but very comfortable Airbnb. One minor warning is that it's a bit like a two-bedroom studio apartment—there are two bedrooms, each with a double bed, but one is internal (no windows) and both are small. It is, however, a perfectly fine and comfortable apartment for a family of four (especially who might otherwise share a hotel room).
The description was accurate, and the neighborhood is a modern and quiet one that's near a public beach for swimming in the Oslofjord, near several restaurants and a grocery, and within walking distance of the Munch museum. (It's a surprisingly long walk to transit, though—10-15 minutes.) There's also a very nice sitting area out back where one can sit on a couch, under cover, and look out at the water. The apartment also has a dishwasher as well as a clothes washer and dryer.
The front door is an internal hallway on the lower level and is little tricky to find—it's easiest to go around back and enter via the patio.