The location of Birgit's flat is great - right beside a metro station.
The flat overall has everything you need: washing machine, comfy bed, kitchen, washroom. Moreover we found the flat had very good value for the cost and was an affordable accommodation in a central part of Wien.
We would recommend Birgit's flat.
The only thing is it can get a bit hot in there in the summer with only 1 fan to help cool the flat. The streets outside are loud with the windows open but you can't hear anything with the windows closed (we had no issues with sleep).
Checkin was relatively smooth and Birgit left clear instructions on how to get the key. Unfortunately, we were to pick up the key from someone and they didn't speak English so we had a small language barrier but we called Birgit and she helped us right away (just learn the german word for "key" before you check in!)!
We would recommend her flat