The apartment itself is very nice and cosy. Really close to central station and very well connected.
Not appropriate at all if you are travelling with children or babies.
The big problem was that it was not completely clean and there were some dirty clothes around, and also the beds, in the opinion of 4 adults, were disgusting. There were some expired food in the fridge and in the freezer, it was disgusting when we got to put our food inside the first night. The bathroom is very small and was also dirty.
The city is wonderful and the rest of the apartment was very good.
You will not regret visiting Copenhague!