I got to say that I really enjoyed my stay in Peter's great appartment which is lockated in the heart of Vienna. U6 and U3 are only 5 minutes walking distance away and the train ride to the inner city (Stephansplatz) takes less than 10 minutes. The neighbourhood is quiet and the appartment is very well furnished with all you need for your stay in Vienna. Next supermarket is also closeby. Peter is a great host and messages were answered promptly! High recommendation from my side!