Karsten is a fantastic host, very thoughtful and considerate. Always there when you need help or want to talk, and not at all interfering when you don't. His place is clean, bright with natural light and is very welcoming. Very close to the S-train station. I would recommend this place to everyone who is looking at it.
A couple of things to note and be mindful of though, esp if you are a foreign traveller (with a big bag maybe, or with odd hour flights): this place is on the third floor and the train station at Nordhavn or the others closely apparently don't have trains running in the wee hours, so it might mean a bit of lugging your bag around for you if you have an early morning flight to catch. Karsten, however, is very helpful and helped me carry my suitcase up three floors and had also offered to drop me to a nearby train station in the morning, but of course I didn't want to bother him so early in the morning.