We had a great time staying with TK. He was very helpful providing local knowledge and everything we needed for our stay in Oslo. He is clearly a seasoned Airbnb host as the check in is very smooth and you're given all of the information you'll need before even arriving. The flat itself is nice and light with lots of space. We had the spare room in the flat which was a good size for the two of us for a couple of nights. Staying longer might have gotten a bit cramped but we did have the use of a wardrobe so unpacking would have definitely helped. Overall I'd recommend staying with TK, you'll be in a good area within walking distance from the central station (but sure to try the tightrope in the park that's on the way!), have a host with a wealth of knowledge of the local area and a lovely flat to stay in