The apartment is in a good location - the main sights of Copenhagen are within walking distance and it is near a metro station, supermarkets and restaurants. It is nicely furnished and adequately equipped for 4 people. The radiators in the bedrooms worked well, but one in the sitting room wasn't working and there was no heating in the kitchen and bathroom. It was generally warm enough, though.
My suggestions would be - a few more coat hangers, blinds or curtains over the window in the sitting room that doesn't have shutters and check kitchen equipment for cleanliness. A couple of saucepans were not very clean.
On the whole, we were happy with our stay and would recommend.