We had a wonderful time at Ulli & Günther’s place. Although it is a bit out of the tourist area (you will need to take the subway to reach old town and other tourist spots), with the Viennese subway system, everything was close and easily accessible. Please note, the apartment is on the third floor and the old building does not have an elevator. During the time we were there, Vienna and most of Europe was going through a heat wave. Although the apartment is made of thick walls and it does have a fan at your disposal, it does get hot inside during these extreme summer days.
The apartment was easy to get to, spotless clean, and it has all the necessary amenities. Ulli & Günther were fantastic hosts. They were quick to respond and provide advice. When one of my devices broke down, they immediately texted me suggestions for where to shop for electronics and they suggested places to see in Vienna. I was very impressed with how they cared about all of their guests and how they took the time and effort to coordinate the use of the shared laundry machine. We knew we were well taken care of.