Mettes place is a really good choice to stay while you are visiting Copenhagen. Her house is located in Indre By (Inner City) so it is very close to the city center, Nyhavn and a lot of great spots. You can walk almost everywhere but when you want to use public transportation – "Østerport" is the nearest station. Almost every train stops here so you can easily reach the central station, the airport and even Sweden when you jump on the Öresundståg.
Mette was a great host. She answered fast via Airbnb message and helped with questions. The room is perfect for a single traveler.
I would recommend that place to everyone who wants to explore Copenhagen for a few days. It's a good choice :) tak Mette