The communication was quick and great, and the location was great as well: you can walk in pleasant streets to almost anywhere in Vienna center. Two of the three rooms are extremely large, the beds are comfortable, and the check-in process is excellent and comfortable. The kitchen is large and there is a good coffee machine based on coffee beans. The WIFI is good too.
However, the apartment is not in a very good condition, and does not appear to be properly maintained (for example, the wooden floor creaks very loudly and sinks, there is some dirt on the walls, deep grooves within the wooden doors, some of the dishes in the kitchen were a bit dirty, etc.). In addition, the toilets are not properly ventilated.
Overall the apartment is beautiful and in a great location!