We had a nice week in Copenhagen staying at Ellen's place. It's a large apartment with some nice features. We appreciated the powerful shower and the record player was a nice touch to listen to music in the evening. Wifi was fast and check-in was very easy with someone meeting us to give us the keys.
I did have a bit of trouble sleeping due to the heat and sleep noise, but I imagine this would not be a problem other than in summer. The curtains are quite thin and it gets light at about 4am in June so definitely bring an eye mask if you are a light sleeper. There is a nice courtyard out the back, but from the photos I was not expecting it to be on a main road. The double glazing does a good job of filtering out most of the noise.