We arrived to Oslo by train and we managed to walk to the apartment in 20 minutes, which was of great value.
As already mentioned by other people, the bathroom was not clean, but for me personally that was fine since we stayed only 1 night.
Falah was very friendly and easygoing with the checkin and checkout, I really appreciate that. I would definitely recommend if you are looking for an affordable place to stay near the center of the city.