The house is small and pretty, is located in a very well connected zone (metro stop, line u3, just 2 minutes walk and it takes less than ten minutes to bring you to the centre). The check-in time is very flexible cause there is a safety key-case at the main entrance of the building. we've never seen Georg but he was always ready to give us instruction.
The only problem with the house was that the courtains aren't thick enough and in the moring the rising sun awakes you. Anyway tihs is a very good place to stay in Vienna and I absolutely recommend it to everyone.