Alexander is an excellent host. He was very welcoming and he kept in touch constantly to see how we were doing. He recommended a lot of places to visit, both in Vienna and outside of it, many good restaurants and also indications on how to easily get around.
The apartament is in a nice and quiet area. It was very clean and equipped with everything you might need even for a longer stay. There were a lot of nice touches, like coffee, tea and sodas in the fridge. We traveled by car and the free parking at the apartament really came in handy. From there it is a short 5 minute walk to multiple public transportation (metro, tram, bus) which get you quickly to all the main points of interest. There are also multiple stores and restaurants within the same short walking distance.
Overall, my wife Oana and I had a great stay and we wholeheartedly recommend Alexander's place.