I stayed at Clara's place for a month whilst I looked for a flat in Vienna. The apartment was so cosy, and had absolutely everything I needed - from tea and coffee to extra towels. It was the perfect size for one person, and the decor is very homely and sweet - the photos really dont do justice to how lovely and bright it is!
Clara was a lovely host, she was really willing to help whenever I needed anything.
From the apartment you can easily get to the U-Bahn line U4 and the bus, and it's fairly easy to get into the city centre.
As advertised, the apartment is not soundproof, so you do have to keep your fingers crossed for considerate guests in the apartment above - but I was rarely inconvenienced by the noise.
I'd definitely recommend this place for any short break in Vienna!