I travelled to Vienna with three teenagers and my mother. We found Ingela's apartment, and we are so glad we did! The place is extremely clean and well equipped. Ingela is an excellent communicator - before we arrived in Vienna, she sent super detailed instructions and directions. We found her to be a gracious and unobtrusive host! The apartment is well equipped -even umbrellas are provided for the guests, and we needed them on our last day.
Best of all, the apartment had air conditioning!!!! Two of the days we were there it was extremely hot outside and the a/c was a life saver. I highly recommend this place, it is quiet but only a very short walk to the subway that will get you anywhere in Vienna.