@fitflop Will try and give you a run down of our trip which was great. We stayed near Westbahnhof station so bought a Vienna city pass to make use of public transport. However our card was never scanned but we had it in case we were ever challenged, The transport system is great and trains/trams were frequent,
We had breakfast at The Golden Egg and Cafe Central, both excellent but be prepared to queue unless you get there early or make reservations. We also had Sacher Torte at the Sacher Cafe, also be prepared to queue. A slice of cake is about 10€ soft drinks 5€, so not cheap but a nice treat.
Try and book tickets for The Belvedere (if you want to see Gustav Klimt’s The Kiss) early.
The Hofberg Palace/ Sisi Museum is near Stephensplatz which is a lovely shopping area.
Schonbrunn Palace is where we saw a classical music concert (I’m not in the least bit musical!) which was fabulous and there is a Xmas market there too.
The Xmas market at Rathausplatz was the biggest with an ice skating track(not a rink). Make sure you have € for the markets for food and drink. The pretzel doughnuts were huge!
Last tip, if you have Netflix, watch The Empress which is all about Sisi and Franz Josef. It’s in German but with English subtitles.
Enjoy, Vienna is stunning!