Me and my wife have stayed in this apartment for 2 weeks. Everything was good from the very beginning: first contact with the owner, quick booking confirmation, detailed description how to get from the airport to the apartment (we came from Russia). Gaby met us exactly at the agreed time, gave the key, showed everything in the apartment.
We should say the apartment has everything you need in your normal life. The detailed list you may see in the description, but in addition you could find such small pleasant things as tea, coffee, sugar, tablets for dishwasher and even packets for garbage. So, you don't have to run to the store just after arrival :) Bathroom is large enough, it was very pleasant to see small toothpaste, shampoo and conditioner.
We were pleasantly surprised that Gaby has changed towels in one week.
The location is perfect! It takes you 4-5 minutes to reach Kettenbruckengasse (U4) by foot, 12-15 minutes to reach the Opera. That's why we did not use buses or trams, only by foot or by metro. You can also reach Billa and Spar by 4 minutes walk.
There is a parking place of Vienna Citibike near the second exit of Kettenbruckengasse ( 5 minutes walk). There is beautiful Naschmarkt with a lot of cafes and pubs near the metro.
The district is quite and calm, the window faces the yard. You can have nicely time, drinking morning coffee on the balcony.
So, we have spent two wonderful weeks in Vienna. Next visit we of course would like to stay in this apartment. Many thanks to Gaby and Stephan!