Benedict was a great host and his place is very true to the pictures. The apartment is right next to a major metro line as well as Vienna's public bike service, so getting around is very easy. You can even walk to many of Vienna's best sights and restaurants. It's also located near a bunch of bars, so the nightlife is right there if you want it.
The only downside I can think of is there is no air conditioning, and we were there during a particularly hot week. Because of this, we had to leave all of the windows open, and it got pretty loud in the middle of the night when all of the bars let out.
Other than that, the apartment was fantastic, Benedict was very thorough and responsive, and we had a great a stay. Would definitely recommend!