This place is exactly as pictured and described. The host is quick to respond. The location is good, very short walk to train which will quickly get you anywhere in Vienna.
I didn't reduce the 5 star rating because none of these things are the host's fault, but I think fair to at least note for future guests:
(1) The people in the unit above are very loud and walk very heavily at all hours of the day and night. There's a legitimate and fairly constant amount of noise on your ceiling and can get annoying/disturbing.
(2) The patio area is nice, but the neighbors smoke heavily. It's impossible to enjoy the patio or even leave the door/window open without getting heavy cigarette smoke drifting in.