Viktoria's apartment is very well located, in a very nice area with bars, shops and restaurants of different kinds. It is not far from the U-bahn stop of Kettenbrückegasse, but it is also quite close to Karslplatz and therefore it is possible to walk to the city center quite easily and rapidly.
The apartment was super clean and equipped with everything we needed: towels and hairdryer. The girl who was waiting for us at the check-in was very kind and her English was super! The only problem was the heat: during those days the temperature in Wien was very high and sleeping in the apartment was quite difficult without a fan or the air conditioning system. Other than that everything was perfect and I would surely come back there when visiting Wien in the future!