Such an amazing unique place to stay - definitely a very special one-off.
Great location - short walk from Rennweg Station ,the Belvedere and Klimt exhibition and accessible to all places of interest.
We bought a weekly Vienna card for transport which was cheaper than a 3 day one so better value even though we were there for 4 days !!!
Also spent a day at Kloster Neuburg - a monastery which is one of the largest wine producers in Europe !!! The church there is stunning and a guided tour of the wine cellars was fascinating. Easy to get to - U4 underground to Helligenstadt then bus outside the station to Kloster Neuburg Stift. You only have to pay the busfare and can use travel card on U4.
So much to see and do in the city and a lovely time of year to stay but we just missed the xmas markets opening this weekend.