Harry's appartment is one of the best options to stay in Vienna. Is spacious, with plenty of natural light, quiet, cozy and equipped with all you can think for a pleasure stay. The little garden is a wonderful bonus.
On top of that, is on a pretty good location, close to all kinds of public transportation and to the main square.
Harry also was an excellent host, very responsive and helpful.
In conclusion, I recommend to stay here to have a nice trip on Vienna.