Andreas and Rita are great hosts, very friendly and helpful! Living at their place was more like staying with the host family than just renting a room. They were always there to provide me everything I needed and to answer all my questions - and I had a lot of them since it's only my second trip to Vienna :)
The apartment is located on the top floor of the building, it has a lot of space, high ceilings (I think 3m) and lots of sun. The room is nice and have everything you need for short stay, private bathroom is at your disposal as well. The building has elevator, subway station is 7-8 min walk away, so no problems to get in and out of the apartment with the luggage. The bed is rather new, I had a good sleep there.
All in all, it's great place to stay in Vienna , which I would definitely recommend my friends for future visits!