Paul's place in Wien is wonderfully placed. In 5 minutes walk you can reach the U-bahn, but if you prefer travelling by bus there is the 48A that stops directly at the doorhouse.
Paul is a wonderfull host, he was very responsive. He (his sister) even left a new light bulb when we asked for one and patiently answered to all my questions, even those not regarding the house but other things as possibility to park on the streets.