Gerd is very helpful and easy-going person. Flat is spacious (kitchen and 2 rooms) and located really not far from city center and close to train station Wien-Hbf. From first impression all looks quite old, like in my grandmother's home, but in fact all is functional and suitable for comfortable staying.
Important detail, which is not obvious from description - flat has private shower (shower corner is equipped on kitchen), but no private toilet. The toilet is common for 2 flats (one of them is the flat we discuss, other one - the flat where Gerd live). When you enter from staircase - you come to antechamber with doors to toilet, the discussed flat and flat of Gerd.