This place is absolutely great. I stayed there 23 days. The pictures are very accurate and the apartment is very clean and calm. The kitchen is well-equipped.
The Rathaus is walking distance. The apartment's area is dynamic (great restaurants around!) and safe.
I booked the apartment, because I had to work at Universität Wien; I'd recommend the place for those who have to be at the university, because it is only a 10 minute walk.
Lee was very helpful and always replied to my queries. I'd recommend the apartment.