I stayed a few days in Vienna at Daisy’s apartment. The apartment is well located (near Westbahnhof), which is a good asset. The kitchen and the toilette are well equipped.
The bed is comfortable (the cover was for 1 person, but I was traveling alone so it was fine), and the building is of easy access.
The only remark is that the curtains are too thin to prevent the sunlight from waking you up early in the morning (specially during spring / summer).
Besides that, I would totally recommend staying in this apartment. I think the price is adequate and the quality of it was good :)