My wife and I stayed at Michael's flat for 5 days in July. The flat is fantastic! It is tastefully decorated and well equipped with what anyone might need for their stay. The location absolutely can't be beat. Half a block from the heart of Nyhavn so you're close to it all, and yet removed enough to feel peaceful when you close up the windows. We walked everywhere during our stay and found Michael's place to be the perfect central spot regardless of where we wanted to go. The rooftop patio is awesome and we were up there quite a bit sharing a glass of wine in the evening. We didn't hear any of the neighbors which was nice to have quiet.
Michael was a first class host and was always available to answer questions when we had them, whether they were about the apartment or the city or where to eat. A genuinely nice guy and we were glad to have met him.
The flat is on the 5th floor and it is a walk up, so if you've got elderly people or very small kids in your party it may present a challenge. On the other hand, it helped us feel like we snuck in some exercise to work off the beer and wonderful food in the area.
I would definitely recommend Michael's place and hope to return soon. Great place, great host!