I have stayed at Wenzel's place for a month and a half. I was starting a work contract in Vienna and looking for a place to stay before I found a flat of my own. The exchange with Wenzel was great: he was very flexible with the arrival dates, which I had to change several times because of the coronavirus pandemic, and he helped me with administrative procedures and mailbox problem. As of the flat itself, it is quite nice and clean, with basic furniture, cooking equipment, and a laundry machine (the table is a bit small, but I was still able to work on it for several weeks). The balcony is quite nice when the weather is mild. The flat is well suited for a one-person short or medium-duration stay. The location is perfect, at the border of the 7th and 8th district , really close to the city center. It is perfect to visit the city, with the center and large museums in walking distance, but also a very nice area to live in for longer periods. The station Volkstheater with 2 subway lines is less than 5 min away, so it is very well connected. Although the flat is a little bit expensive, it is worth it considering how nice it is.
All in all, this is an excellent place, which I recommand without hesitation.