Wendi (she chose the American name of Jill) is extremely nice. We had a long conversation the first night about what it was like being a Chinese international student in Austria and her experiences playing piano, interacting with the locals, etc. I felt like I really got to know my host, which was such a great experience with my first time in Vienna.
Something to note - if you care about cigarette smoking , the occupants of the house smoke in the kitchen, with a big window open. The smell of smoke will tend to linger, but if you shut the door to the room that you're staying in, it won't get into that room. It didn't bother me too much (I don't smoke nor am I used to the smell of cigarette smoke) but just something to think about if you are not used to the smell of cigarette smoke when you walk inside someone's house.