If you’re coming to the city and Alex and Bettina’s apartment is available, then book it. This was my third or fourth visit and it was outstanding as usual. Apartment is spacious, very clean and tidy with everything you’re need. It’s also on top floor of a lovely building with a quaint lift and super quiet for a great sleep. U Bahn is 5 min walk as is tram D for easy access to the Ring and other trams and buses. 10 min stroll to Opera House and loads of cafes and restaurants. Great place in a great city