This a very nice, very clean apartment in a decent location. Depending on where you plan to spend time in Oslo, however, the location can be quite inconvenient. It's some distance from both the metro and the tram (though some bus lines are close) and there isn't a good grocery store in the immediate vicinity. All of these things only require a bit (or, sometimes more than a bit) of walking, but this is something of a drawback, as in many other parts of the city, multiple public transportation options and a solid grocery store will be less than 30 seconds from your front door.
The other issue was the wi-fi, which was often very slow and featured regular interruptions with a (real or fake) popup from the internet service provider (get) asking me to take a survey. This happened constantly, which at times made the internet almost unusable.
All in all, this is a good place to stay while in Oslo, but for the price, there are definitely better options.