The host: Peter was a very responsive host! I made my reservation very last minute and Peter replied quickly to all of my questions. He even offered to arrange a taxi pickup from the airport (for an additional charge). I didn't get to meet meet Peter at check-in but the process was still smooth.

The apartment: very good. It has everything you need for a short stay in Vienna. The location of the apartment is great -- close to supermarkets, restaurants, bars, public transit.