Stayed with my girlfriend here for the month of April.
The apartment is in Neubau roughly 500m from the Volkstheatre train station. Which is super easy to get around the underground.
Alternatively you can walk in to the centre within 20 minutes and it's a great walk past the museum quarters and through the amazing grand area of Vienna.
The area is great with loads of restaurants and cafes. Plus there is a big shopping precinct on Mariahilferstrasse
The apartment itself is exactly as the described and in the pictures. It's not super large but is great for a city break.
Super fast internet connection, great bathroom and toilet and a pleasant view outside into the courtyard which looks great in Spring.
The only thing perhaps would be good is a fan.. as very little air seems to get in with the windows open. The courtyard is dead still.
The communication was great and getting the keys etc was easy.
The only thing that was wrong was the dishwasher which wasn't working. No big deal for me as we just washed dishes.

Overall I would stay again. Thankyou