I had a great stay at Aliz's place. She was very accommodating and the apartment was clean. The apartment location is outstanding, in walking distance to so many of the major sights to see in Vienna. There all also incredible restaurants just around the corner - I highly recommend Zwolf Apostkeller just next door and Figlmuller for authentic Austrian food (make reservations), as well as Schmarren & Palatschinkenkuchl (all within 2 minutes walk from the apartment).