Everything was great! Niels's apartment is very nice and cozy and very well located. We rarely used a public transport since the weather was nice.
There are a lot of great places to eat near the apartment. I personally can point out the "Bæst Pizza" for dinner and "Sidecar" for breakfast.
As for the Niels himself, he is one of the best hosts I've ever seen. Very communicative, accurate, polite and ready to help regarding any matter.
The only thing that can cause a little discomfort is that the shower is not in the apartment itself. But it is absolutely not ruined the overall impression of staying in Niels's apartment.
Thumbs up!