I really enjoyed staying at David's place for a week. It's 4 flights up with no elevator, which was fine for me but you should be aware of this! The other minor detraction for some may be the shower, which you can see from the photos is between the tiny sink and toilet. It's a bit of an adventure, and I wouldn't want to live like this, but for a week it was not an issue for me. Those were the only 2 things that might be of concern to anyone, though for my part, it's not a complaint. Also it was clear in the description and photos--this was not a surprise to me.
The location is great. I really liked being in Christianshavn. It's not so touristy yet there are plenty of attractions and places to eat. You can easily walk across the bridge to Nyhavn, or catch a Metro or bus into the main part of Copenhagen. About a block away is Freetown Christiania and right in there is a music venue called Loppen which unfortunately I did not get to, but definitely check their schedule! There are some good international acts who play there.
The space is wonderful. There is a front balcony and a back balcony. The one off the bedroom gets the morning sun so if it wasn't cloudy in the morning, it was bright in the room by 5am. Maybe bring an eye mask if this could be an issue for you in the spring/summer. Also in May it didn't get dark until 10. Anyway, the decor is really nice, there is everything you need, and he left fruit, coffee, beer, eggs, and other stuff in the fridge for me. There are a few convenience stores or markets on his street, and plenty of other stuff within a few blocks. The apartment is clean and well-equipped. I'd looked at hotels as well as Airbnbs and decided that for a week I'd like to live more like a local, and the price was about the same but to me the value here was better. I had a few questions while I was there and David got back to me immediately. I had a fantastic trip to Copenhagen and staying here was a good part of the reason.