We spent four days in Wien with my girfriend, and Beatrix's place is everything what you looking for if you want a quiet peaceful place after a big trip in the center, Beatrix and her family is very kind and welcoming, and we really liked the joyful atmosphere in the house.
The transport is good, the u-bahn is 5 min from the room by walk, where you can get the center in 20' min.
The room is big enough for two person, separeted, and very clean,
Thank you Beatrix! :)