We spent 3 days at Daniels place (family 2+2). Very well organized person, he welcomed us and explained eveyrything what we needed to know. Totally positive attitude. The flat itself was very nice, really clean and comfortable, 2 bathrooms!!! when you have 2 teenagers with you it really saves a lot of time. Air conditioning, well equiped kitchen, microeave, coffee maschine, even a full size oven. Location was maybe a little bit industrial, but very well comunicated with the Vienna center (P+R few minutes away from the flat). We can recomend this place :)