Strongly recommend Kristina & Sofia's place! Don't hesitate to communicate with them because they are very responsive. They gave me a warm welcome and suggested some local places for me to visit and dine, which made my journey unique and amazing! The house was perfect in terms of everything, it matched the description, which was very clean, spacious, and comfortable. They have everything you need for your daily bases, such as a washing machine and kitchen utensils. The location is right at the heart of the city center, the streets are quiet and safe. It takes around 30 minutes train/metro to get there from CPH Lufthavn.
I wish I could stay in their house again when I revisit Copenhagen!