My girlfriend and I traveled to Copenhagen for 4 days and were looking for something well located and comfortable. Gustav's apartment is very well-equipped; it has all the amenities you might need, so you don't really need to worry about bringing anything with you. The kitchen was fully equipped too, the space was very cozy and tidy, and we really felt like at home.
Gustav was very punctual, welcoming, and always answered all of our questions within a couple of minutes. Great communication altogether!
Lastly, the apartment is very close to the city center, there are bus and train lines within a 5-minute walk. If you prefer to take a bike, you'll be at the city center in less than 15 minutes.
5/5 altogether and would definitely recommend to anyone looking to visit Copenhagen.
We really enjoyed our stay!