First of all we enjoyed our stay with Joachim . Communication was easy and the apartment was neat. It's location is in a calm area of Vienna but the U6 station Neue Donau can be reached under 10 minutes when walking.
But as described before, the apartment isn't fully ready yet. The panorama glass is nice but the fully surrounding balcony is under construction which obviously diminishes the view. The water in the shower drains slowly but if you are the only person in the apartment it's okay. An additional set of fresh towels would have been nice too.