We stay in Wienna three days and Mario's place did it more pleasant.
All it was as described.
For us the most important (I will recommend it for this) was the location (The public transport (subway,...) and shops (Spar,Lidl,...) are less then 5 minutes walking away. Near is also the parking which was also cheap (26 € for 3 days).
In the apartment all was OK, the kitchen, bathroom and comfortable beds.
The TV and the Wifi also works great.
The check in and check out with the lock box, was also a great experience.
Thank you Mario for all your useful advices.