It was a short stay ( one night) but we really enjoyed the apartment. It's a wide studio with everything you need. The neighbourhood is good and it's walking distance to Schonbrunn Palace (20min.) as well as the Westbanhof (5-10min.). Really clean apartment. We weren't checked in by Sonja, but her husband was really helpful as well. Great comunication, 100% accuracy.
We recommend staying even for longer time.