The apartment is great, it is in walking distance to most point of interest in Oslo center and if you want to go further public transport is also very close.
The apartment it self is clean and neat with anything you would need for a nice stay. The neighbours are quiet and friendly and the view from the balcony is just breathtacking.
The hosts are very friendly and helpful making it easy for first timers in Oslo to find and check in/out of the apartament or find what todo around the city. A solid 10/10 all around!