The hosts provided lots of information making it easy to find the apartment and check in. We found the location to be great - located on a side street close to a pedestrian shopping street. While it was quiet in the apartment over the weekend, there was plenty to do a short walk away. It was about a 25 minute walk to the Staatsoper/Hotel Sacher area.
Two small points: (1) We would note that there are currently some renovations being done to the building/neighbouring buildings so it might be a bit loud during the week (we heard some construction noise Monday morning before we left). (2) There are two small windows in the apartment and some large skylights, so there is natural light but those who would like a window view or a breeze may not enjoy the apartment.