We had a great, although pretty short stay at Rene's place. He is very communicative, knows a lot about public affairs, helpful, does everything possible to make the stay comfortable. The place is clean and great, and despite being a shared room, privacy is also ensured as Rene is paying attention not to disturb as far as possible. Location is pretty good also, the very center of the city is 45 mins comfortable walk, cruising along Vienna's well known shopping street. Totally recommended.