This apartment is located in a very posh and convenient part of the town. We loved the location and how easy it was to get to it from the main station. Oslo is a smaller city, and the unit was usually within walking distance of most of the places we wanted to see like the gardens, castle, and even opera house (a bit of a walk, but very pleasant).
The apartment itself is up a flight of stairs and is a large, spacious unit. The main rooms are big and provide space to spread out. The bathroom and bedrooms were worse than we expected, but the price and location balanced these things out for our short stay.