We visited Nicolai's apartment for the weekend and it was great! Nicolai is very kind host, he met us personally and prepare welcome treats for us in the apartment.
Apartment is located in nice building and it is really close to all places of interest, museums and the city centre. Also it is close to the airport. Nicolai' home was clean and good equipped so we had everything to feel ourselves good during our trip.
We will definitely recommend Nicola's apartment and hope to visit Copenhagen again!