We had a great time staying at Yulia's place. The room was cosy and very funkily designed. Yulia had superb tips on what to do in Vienna. The apartment was close to the centre ( just 4/5 metro stops away) and the metro stop closest (Raumenplatz) was less than a 10 min walk. There is a tram station even closer, just outside the building.
Yulia was really sweet and even left us a little gift ( as one of our birthdays fell on the day we were there!)
All in all we had a great time and would recommend it for a single person or a couple to stay!