Peter was a great host and had clear lines of communication open from the time we made the booking. He waited for us to check-in on a Sunday afternoon and explained the area, the apartment itself, the 'must sees' in Vienna including the ice cream joint! He was very precise and clear in explaining to us the public transport process, where to buy grocery, what to see in the Ringstrasse etc.
The apartment itself is spacious, well-equipped including a kitchen and is centrally located literally a stone's throw from the Westbahnnof train station. It was very convenient for our departure as our train left from this station. The area is very safe and a lot of commuters and other people move around but is not noisy at all.
I would strongly recommend Peter and his apartment to anyone visiting Vienna.