Diana's flat was a great place to stay in Vienna for our city break. The apartment was very spacious and had beautiful high ceilings. Diana as a host was very hospitable, leaving complimentary wine and chocolates. We also found her to be very accommodating allowing us to leave our bags on the last day rather than have to carry them round with us. We found the location really convenient, under a 10 minute walk to the metro and also in an area with some great restaurants. We'd particularly recommend Ulrich for a really tasty brunch!
Overall we were very happy to have been able to stay here. My only reservations would be that the place could perhaps do with a little touching up as there is some noticeable wear and tear on some items of furniture and a fair few light bulbs that don't work etc. There was also an unpleasant sewage like smell on a couple occasions though this quickly passed.
If you're looking for a place to stay whilst exploring Vienna I would certainly recommend.