Two friends and I stayed in the flat for almost a week over New Year 2018. The flat is really beautiful and the photos don't really show just how large the place is. It fitted all three of us extremely well in three separate double beds. The bathroom is huge with a seperate toilet. The kitchen has everything one could ask and is also big. The living room was extremely comfortable and we recovered from sore heads on New Years day by watching Netflix on the TV.
The flat is well located with a tram at the end of the street and the main station a 10 minute walk. The city center is also a c.20 min walk and I didn't hear any noise from the street below during our stay.
I would really highly recommend this beautiful and comfortable flat to anyone wanting to see Vienna!