It was a great experience. I've stayed for 3 weeks and would definitely stay more during my next visit to Copenhagen. Tobias was very friendly and quick to respond (once there was a small problem with a heater that was resolved fast). The apartment is very nice and airy thanks to the mezzanine and roof windows. The metro station is very close nearby. Around 35 mins to the airport.
Please mind there is no elevator so you'd have to climb to the 5th floor by stairs. It wasn't a problem for us though.
Thanks again Tobias!