Nicki's place is lovely and SO well situated. The apartment was quiet, large and comfortable, and is a short walking distance from the metro station (15 min train to the airport) and to the Nyhavn area. There were tons of things to see and do right outside of the apartment, and we loved being in the centre of things! One note: it's a fourth floor walk up, which we didn't mind, but if you have mobility issues it would be something to keep in mind.
We will definitely stay here again when we come back to the awesome city of Copenhagen!