We had a great time staying at Viktor's apartment! It was very light, airy and spacious, had a very comfortable bed, and had all the equipment you could possibly need. The location was also perfect - very close to the U-bahn and also within walking distance of the city centre (but still very nice a quiet in the flat). Viktor was very helpful, friendly and welcoming, and very quick to reply to messages. We would definitely return to stay in Viktor's flat and would recommend it to anyone wanting to come to Vienna.