First, I can't say enough about Henrik & Frederick. They were almost always available to answer any questions in real time. We arrived about 11 PM, way after the usual check in time. They arranged their schedule so that they were waiting for us to let us in when we arrived.
We enjoyed our stay. The apartment was well equipped, modern and comfortable. The location was fantastic with a market, bakery, and a bus stop close by and the palace and other central attractions within easy walking distance. The apartment is in a very quiet neighborhood. We had absolutely no issue with noise. The only caveat was that the apartment is on the fourth floor (there is no elevator). We didn't find this a problem, but it is probably not the best choice if stairs are an issue. All in all, we highly recommend their place.