The first important thing is that the staff at this hotel are the best possible. I am an older person who needed considerablel assistance coordinating transportation, etc. and they could not have been more helpful! The hotel was also immaculate and located across the street from a huge mall with transportation stops in front of it! These were the problems--the elevator was broken for 3 days of my stay so I was trapped on my floor, unable to leave. You could not use the stairs either because all exits required cards with chips so if the card wasn't working, you were OOL. The same issue (broken elevator) caused an emergency alarm to blare for many hours (8+), which was problematic since my room was next to the elevator. The second problem was not specific to the hotel, nevertheless, I would not have gone to Vienna, knowing this. They are building a new metro line which means many streets and sidewalks are closed as well as metro stations non-functional. Each day I looked at Google maps for my adventures of the day but unfortunately, when I would actually start out to find locations, I would be unable to follow the directions because either the metro stop was non-functional or the street was closed. I circled one square for over an hour with the phone insisting I was within 5 minutes of the location but each path I took was blocked with construction. This is not the time to visit Vienna!