Michael was very reactive and the communication was friendly. He was also very accommodating and flexible. The flat has everything you need, even for a longer stay (ironing board, washing machine etc.) and the main room was quiet. True, the flat is not in the prettiest part of Vienna, but Vienna is amongst the safest million people cities in the world so it should not be a problem. And the park close by is good for exercise. Shops are close by as well, as is the subway station (8 minutes walk). I would recoomend staying at Michael's place