I stayed in Mia's flat with my partner for four days. The interior is very beautiful and Christianshavn is a great neighborhood to stay in Copenhagen. Around the corner are Sankt Annæ 8 - a very cute restaurant and Sweet Treat which is a great place for coffee or breakfast.
From the airport the metro takes you in less than 15 min to the flat and the station is just around the corner. Also the flat is perfectly located for sightseeing, which allowed us to walk to most of the places.
We had a great time and Mia was a great host. I would definitely come back!