Large, clean, modern, well-equipped and comfortable apartment. We were two couples that stayed for 4 nights. Beds were very comfortable and the location is very quiet at night. Wifi speed was exceptionally high ( almost 100Mbs.) Cable TV in every bedroom as well as living room. Kitchen was sparse, but adequate as we ate out. The location is just on the edge of the Old City. Walkable to St. Stephen Platz but too far to walk to Museumquarter. However, the #2 Trolley is at your doorstep which takes you to most every tourist site. Also the U1 Underground is one block away and easy access to City Centre, Train Station and Airport. The area around the apartment is very quiet and without much in the way of tourist attractions.
Communication was with property management was good. The apartment is accessible by code and lock box so very convenient as you are not having to meet anyone on arrival. Instructions and code are send a couple days before your departure and are very well illustrated. There are no personal touches as there is no individual property owners. Absolutely nothing beyond necessities are provided. No salt, sugar, shampoo etc. Pillows, towels, sheets and blankets is what is provided.
I would certainly use Vienna Stay Apartments on our next visit to Vienna.