We had a great stay at Mathiaes' home. The location is *excellent* in terms of ability to walk to nearly any of the major areas in Copenhagen. One surprise to us is how close it is (one block away) from a MAJOR "walking-only" shopping district. For us, this was not an important feature, but I'm sure that there are many people who would find that attractive. The grocery store was only a couple of blocks away, and there is an endless supply of restaurants, bars, and coffee shops nearby.
We did find that there was often a lot of street noise at night, particularly from drunken people walking home at 3 or 4 AM, which was less pleasant, but part of being in that neighborhood.
The size of the apartment was larger than I expected, very clean, and a really wonderful old-world ambience.
It may be worth mentioning the narrowness of the staircase. It was not a problem for us, but it may be for some individuals with knee issues or who are bigger individuals. The apartment is on the third floor so the staircase is important to note.
The shower didn't have a curtain, and there was a very limited supply of towels, so we ended up washing the towels multiple times, as we needed to use them to mop-up the bathroom floor after showering, as most of the floor would get wet. A squeegee would have been a helpful amenity to have to scrape the water toward the drain.
We very much enjoyed our stay, and Mathiaes was very responsive and provided some great suggestions along the way as well.