Diana was extremely helpful and communicated perfectly. We never got to meet her, but did see her husband shortly after we arrived, which was perfectly pleasant.
Booking was easy and quick, and Diana has a key box outside the front door to make arrival access flexible and simple.
The description of the apartment is accurate - it's a lovely space, with high ceilings and a modern, light feel. The bathroom is especially smart. It's slightly awkward getting around one side of the low-level bed in the bedroom but it's not a big issue. Towels and bed linen were all spotless and crisply laundered and the whole apartment was beautifully clean.
The apartment is a short walk from the grand Museum Quarter (about 8-10 minutes) and has some interesting restaurants nearby along the road - notably Sosaku, with fabulous Japanese food.
We would happily stay here again. The rate is very reasonable - and Vienna is incredible. We walked everywhere - the Spanish Riding School, the opera house, the Danube Canal, all around the centre - and the apartment was an ideal base.