I don't do Airbnb and haven't been farther north than Trondheim, but I noticed these things:
This is a new listing, which I think few regular users of Airbnb would recommend. There's not even one review.
An American-size "double bed" is quite narrow. It may be an entirely different story in Norway, but I'd ask about the width of the bed. The second bed is described as a "sofa bed", and those are not always so comfortable.
Heat is from a "portable heater". What is that? Would it be adequate in Norway in the winter?
I'd zoom in on Google Maps to check on the restaurant situation. The Airbnb map shows the two closest food options to be a burger place and a low-end chain pizza restaurant. If you opt to go in the winter, you might not be thrilled to have a long walk for food.
I'd also check on the proximity to your arrival point (airport? dock?). You will want to avoid the need for a taxi if possible. Norwegian taxis are $$$ (like everything else in the country).