Thanks to Andrei for being an excellent host. His appartement is very nicely done up, the place is quiet and safe. We didn't miss anything.
The appartement is located in the center of everything, all must see places of Vienna are easy to access.
Andrei and his father, who added a personal note to our experience, are courteous and flexible enough to give sympathetic consideration to special needs and wishes.
I'll be back one day, thanks again!