Markus's place is well-located, spacious and comfortable. My husband and I stayed here for three nights and enjoyed the close proximity to the U-Bahn (~3 minute walk), the easy check-in, and the cafes and restaurants nearby. Markus was very easy to communicate with and checked in with us to make sure everything was going smoothly. I would highly recommend this place if you are visiting Vienna and want to stay in a nice neighborhood with easy access to public transport!