I stayed here for 10 days in September 2018 while I was in Vienna for a work trip. The location is fantastic if you are in Vienna to see the sights. It is <5 minute walk to the underground, 5 minute walk to the naschmarkt, and a 10 minute walk or so to the Opera House/Ring. The units themselves are in a nice building on the second floor. There is a single locked door for the 4 units with a shared washing machine/ironing board in the hallway and then each unit door has another lock. Overall the stay was nice and I would recommend it although I did have a few issues as below.
Pros:
-Fast stable wifi
-great location to get around the city and enough nearby restaurants, shops, etc. you can walk to
-kitchen with refrigerator, microwave, single stove, and stocked with plates, silverware, glasses, tools, some staples (salt, pepper, oil) and some pots/pans.
-Very responsive host
Cons:
-My check in was delayed several hours (until 6 or 7PM) as the unit was not cleaned.
-There are no deadbolts, only digital code locks. During one night a stranger entered my unit (assuming he was staying in one of the 4 units and entered the wrong one). He quickly left but this was obviously concerning and left some doubts on how the codes and locks are managed between visitors. In the future I'll be checking for a deadbolt.
-No air conditioning: I knew this up front and pretty standard for Vienna, but keep this in mind when comparing options or a hotel.
-The unit would be pretty small if you had more than 1 person for any considerable length of time. I was by myself and had plenty of room.
-The pillows were disappointing. Not really a true bed pillow was offered but more of a throw decorative pillow.