This Airbnb is very beautiful, quaint, and in a great location. Diana responded quick and check in was very easy and quick, even though we arrived late in the evening. This Airbnb worked well for my friends but it is not for everyone.
A few main things to keep in mind before booking is that it is up 4 large flights of stairs. If you are unable to do stairs or if you have a a lot of luggage, this may be difficult. As listed, there is no a/c so it gets very hot on the 4th floor. If you are unable to handle intense heat, this may also not be for you. There is only one fan so not everyone can utilize it. Lastly, one of the pull out couches is broken so my friend just slept on the couch. If you need a proper bed for every guest, this may also be an issue.
Overall, my friends and I had a great experience and we really enjoyed our stay. We loved Vienna and our little flat for the night!