Just got back from my short trip to Vienna, where I've stayed at Can's and Agnesses place and have nothing but praises for them and the flat! Very clean, exactly as described, close to Museum Quarter (3 metro station) and to the city centre (6 metro stations). They were very helpful and ongoing and I really, really enjoyed staying in their flat. If you too are coming to Vienna and want quiet, cozy place for yourself - this is what you need :)