Our stay in Vienna was great.
Everything was perfect with the house and with Dragan. He and his wife were really nice, and were always ready to help us with every questions or dudes about the city or the surrounding areas.
The house is a little bit away from the city centre, but you can take the tram in front of the house, and you just need 10min to arrive the city centre.

I personally recommend the stay in the appartment of Dragan.