What is one of the best thing about this room is the real feel of privacy. Room is located behind the kitchen but that doesn't mean you will smell smth (there are two doors between kitchen and room) and even if smb is present is kitchen (which was rare occasion) it doesn't disturb at all cause the scale of kitchen is also grand. Most times I came home I havn't met anybody.
I haven't met Rainer personally but he organized all perfectly. All people I met in the apartment were nice and talkative just enough )
Do not expect much from the room itself it's quite basic. Clear but not neat, it has maybe some feeling of a hostel.
The area is really very central and very nice especially in the morning when the streets are deserted you feel like 1 or 2 centuries ago. Also the area is full of bars and clubs which from one side makes it very easy to reach but on the other at night especially on weekends the square becomes the clubby place and the noise can stay high till 2-3 in the morning.
Also should notice the lack of the elevator with quite steep staircase to the 4th floor.
For me all this were not disadvantages and i really enjoyed staying at Rainer's apt but i should mention it for other travelers. Should definitely recommend this place to young travelers who want to see Vienna from different sides and are not looking for some extra comfort