We just returned from vacation after visiting both Budapest and Vienna.
In Vienna we stayed in Dans apartment so very close to everything - metro, trams, busses, a few minutes from city center, supermarket, restaurants etc.
Arriving and entering the Apartment according to Dan's instructions was easy and the Apartment had every thing we needed and Dan was very helpful to us.
If we return to Vienna we hope to be able to stay here again. We can strongly recommend the apartment, the location and the host.