Wolfgang and Christine were very communicative and friendly people, check-in and check-out was absolutely seamless. The apartment is in excelent condition, as you can see on photos, spacious enough for 2 - 4 guests, perfectly clean. There are everything you need for comfortable staying, and both kitchenware and furniture are very good quality, not cheap! The bed was very comfortable, we had very good sleeping. Bedroom window faced to inner yard (absolutely quiet at night), other rooms faced to the small streat, with very little traffic.
The apartment location is very convinient for short time tourists, 10-12 minutes walking (or 2 stops by tram and 3 min walking) from Wien Mitte train station. (You get Wien Mitte from Airport in 16 minutes by CAT train express , or in 30 minutes by S7 local train, that much cheaper, especially you have day- or weekpass for Wien transport). Main tourist attractions you can get by foot (20 min to St.Stephan i.e.) or catch the tram (tram stop is in 3 minutes walking from apartment).
Nearest good supermarket SPAR is in 3 min by foot only.
Wi-fi was very good, heating system with autonomos control was very useful for us too.
I and my wife recommend this apartment without any doubts !
Thank you Christine and Wolfgang!