I recommend Diana's place to a group of 1~3 persons. I think it's the best place to stay in Wein. Diana was very generous person! The location was perfect. And the apartment was so clean and there are markets and restaurants near it. The shortcomings were It's on the 4th floor(top layer of the building), so a little bit hot inside and we can exercise to go up there.(There is no lift.) But you can see stars through the window on the ceiling :)
If I had enough money to stay more in Wein, I would want to stay more in Diana's place!