Our stay at Peter's apartment was excellent. He manages the apartment very professionally and was extremely helpful throughout.
The apartment itself is spacious, clean and has absolutely everything needed for a short or even long stay.
We stayed here just prior to Christmas and the apartment was warm and cozy, close to a Spar supermarket and also the interesting Nacht markets. It's also about a 15 minute walk to the all the major museums.
I highly recommend this apartment if visiting Vienna.