My friend and I had a wonderful weekend staying at Gray's beautiful apartment. It was very spacious, spotlessly clean and the interior design is amazing. Gray was an ideal host - friendly, helpful and very prompt to reply.
The building is well maintained and ideally situated on a pleasant street in a fantastic neighbourhood full of great bars and restaurants (we recommend Fleisch for dinner and Noho for cocktails!) It was perfect to be able to walk into the centre of Copenhagen from there (about 25 minutes), or to jump on any train into the centre. The train station is a stone's throw from the apartment.
It was cold when we were there, and so it was such a pleasure to come back to a nice warm, cosy flat at the end of the day. As others have said there are a considerable amount of stairs as the apartment is at the very top of the building, but this means it is quieter, warm, has great views, is flooded with light and has high ceilings. Make sure that the person staying in the loft bedroom has a bit of a head for heights as the stairs up to it are fairly steep.
We wouldn't hesitate to recommend Gray's apartment, and hope to stay there again one day when we return to this lovely city.