The description of the apartment is accurate.
Ulrike responded quickly, positively and in a friendly way to my every question, request and comment.
Ulrike's father met us on time. He explained things in a friendly way.
The apartment is wonderfully located. The neighborhood is safe, quiet, attractive. It's a short walk to tram and bus stops, not much more to metro stops, and the Ring itself is within walking distance. The neighborhood has much to offer: a sweet Austrian-Polish restaurant around the corner, a grocery store almost across the street, cafés, konditoreien, a wood-fired bakery with great whole-grain breads, fruit & vegetable stores, more grocery stores, more restaurants, etc. A nice down-to-earth mix of apartments, provisions, stores and light industry (artisan manufacturing).
The lovely old building is in very good condition. Solid construction, spacious halls.
By the time you get to the apartment you're behind three doors, so ultra safe. 12' high ceilings, I'd guess. The many windows face two small interior courtyards, yielding light and ventilation without loss of privacy. The apartment has recently been remodeled (walls and ceilings, appliances, etc.) without loss of its old character. The kitchen is especially well appointed—pretty plates, cups and saucers, nice utensils, etc.
The living room and bedroom are simply but adequately furnished. The old chairs and tables and bureau in the hall give the place some character. Nothing is tasteless.
There was no street noise and almost no building noise.
The neighbors we met were friendly. We didn't know how to do something about the range, and the neighbors showed us in a friendly and helpful manner.
The morning sun warms and lights the living room.
It was a pleasure to deal with Ulrike and her father.
Should we return to Vienna (very likely), we hope to return to this apartment.