I booked Vindobona Apartment for a 3 nights stay for my brother-in-law and my 13 year old nephew visiting Vienna as the location is absolutely perfect, only a 5' drive from my apartment. There is a bus station 2' away or a parking lot right in front of the house that is free of charge from 11am to 8am the next day, weekends are free. My family took the bus for 2 stations until D tram or until the metro and they mentioned a few times how happy they were by how practical it was.
The apartment is large, minimalist, airy, bright has beautiful Danube & vineyard views. The fast internet connection and the well documented guide book were very useful. The apartment wing is connected to the hosts house but you don't interact. The host was super friendly, kind and helpful! I highly appreciated that we were accepted on short notice as we were rejected by a lady that didn't want to have men staying in her beautiful Villa in Grinzing. As I wish to deliver a fair review, I would like to mention the tiny complains that I received at the check-out from my family: it was too cold inside the flat (I was told too late to announce the owner), the indoor staircase was not clean and there was only one bed made and had to share the bedding from one bed although they both wished 2 pillows each (one small & one big). Nevertheless, it was a good stay and the reduced rental price made it more enjoyable. :) Vielen Dank!