A good budget hotel. Everything is beautiful and clean.
But it was deliberately done so that they would not stay there for a long time. For example, the sink is right in the room. The door to the toilet is not blind (there is a gap of 10 cm from the bottom, 100 cm from the top) and so on ...
A decent breakfast buffet.
It is located within walking distance to the metro and to the center of Vienna.
For this money, it is quite an acceptable option.