It was a perfect stay at Nicolaj's and Ruiting's home! They welcomed me warmly and we had some nice chats although I was gone most of the time since I attended a conference at the University. In fact, if you have to go to the University of Copenhagen, this is the perfect place to stay since it is only a 10-15min. walk to the buildings. But also downtown is just a short and nice stroll away.
I can highly recommend them as hosts! Their appartment is super clean and tidy! One day, when I came home, Nicolaj was playing a video game and when I arrived he even put on his headphones - very considerate! Thanks guys!