I stayed in Daniela and Peter's amazing apartment for 4 nights and I will definitely be in contact with them again the next time I visit Vienna. They were really great people, easy to get on with, helped with anything I needed and Dani makes a great sandwich, worth the stay alone! They have a bike you can take at any time, i took it for tge day and had a great ride and a really fun day out.
The location is pretty much perfect, not far from the town center, close to the underground and a tramnline just outside. I travelled by taxi to and from the airport so it was no trouble, bit I'm pretty certain its easy to take public transport too.
I would absolutely recommend anyone else to stay there, you'll have a great time and Vienna is amazing.