Shacin is one of the most helpful Airbnb host I have ever had. I had a few request including being able to leave my bags earlier than check in and have a way to have some hot water in the morning and he easily accommodated these on short notice. He is a great host.
From the outside the building does not look particularly inviting, but the little room is great and the area that it is in is one of the most fun in Oslo. For the cost of this room the value is huge! I recommend totally unless you are looking for new and swanky. This is a very simple accommodation but fantastically located.
You do need to be ok with some stairs!