I stayed for four nights at Grethe's place and thoroughly enjoyed my time there. Grethe was remarkably flexible with my arrival time late in the evening and gave me a friendly and warm welcome.
She described the basics for me and took time to answer my questions; she also provided helpful tips for my first activities in Copenhagen and encouraged me to text her in case of further questions. In short, I felt very welcome and Grethe is certainly a warm, outgoing and friendly host.
Her personality is also nicely reflected in her very cosy and simply wonderful apartment full of books, artwork, an array of fascinating lamps and lots of decorations and bric-a-brac. A highiight is the balcony with a view over Copenhagen's roofs and, if you wait for it on a Saturday night around 23.45, a perfect view of Tivoli's fireworks!
The apartment looks just like the pictures and it is truly a feel-good place which made me feel like I was at home.

The only minor caveats I have for future guests at Grethe's place are 1) you will find the shower a bit difficult if you are a very tall or big person and 2) you need to climb a lot of stairs till you are on level 5 of the house so keep that in mind if you have got a lot of heavy luggage.

So, in a nutshell, I can highly recommend Grethe's place.
You will meet a picture book host of the AirBnB concept and stay at a true home away from home.
Thank you, Grethe!