The flat is a bit smaller than it seems from the pictures, but otherwise pictures represent it well. It is a convenient location if you go from the airport (just take s7 to Rennmeg, 5 minutes walk and you are here!). It also take about 15 minutes of walk+tram to get to Karlsplatz. Keep in mind that this the flat is located on the second floor, but this is 3 stair flights, and there is no lift in the building. We had a stroller, and it was a bit tough to take it up and down several times a day. The flat is cosy, clean, convenient to stay at. The beds are comfortable. Daniela was very responsive and flexible. We haven't seen her, but our communication was working just fine, her mom lives in the same building, so she opened the door for us and we were communicating in a mixture of Spanish and Portugese (we don't speak German, she doesn't speak English), she was very nice and sweet, explaining us where everything is located. All in all, I can easily recommend Daniela's place to stay while you are visiting and enjoying Vienna.