Diana's apartment was beautiful. It was in a historical building with high ceilings and very lovely details. We stayed only one night, but apartment has perfect location when you want to explore Wien even more.
The apartment was clean and I also love the mattress which was perfect, because it is always a struggle for me when I travel around.
There were a few things which can be improved in future such as more tea in the kitchen, especially now during the winter, the plants were a bit dry and there was a broken bin in the bathroom. But as I said I am only mentioning these details as a room for the improvement, they didn't spoil our stay at all. I already recommended this beautiful apartment to my friend.