We spent a week at Sonata and couldn’t have been more pleased with what we found there. The apartment was well-cared for, well-furnished, and had a well-equipped kitchen. Christian was an excellent host, giving us a thorough tour of the apartment and much useful information on important services and attractions. Not only is the apartment close to good groceries and restaurants, but almost everything that you might want to do in the city is walkable. We were only on the subway once in seven days. Walking out of the apartment, you’re in the center of the shopping and museum districts within 2 minutes. Yet, because the center of the city is partly turned over to pedestrian walkways, you’re not surrounded by heavy traffic. Vienna is a gem and so is Sonata. We’d go back in a second.