Johannes is extremely easy to communicate with and provides a fuss free check in, he also provided some lovely touches such as a bottle of wine and chocolates during our stay. The apartment has a beautiful view facing the opera house and balcony to enjoy the view from. Sadly during our stay there were some loud noises during the middle of night, so would recommend if you are a light sleeper or want somewhere quiet to stay.
Otherwise the apartment is well located, with most major attractions within walking distance or short commute.