Awesome location, extremely handy to all public transport- trams, trains, buses.
A short stroll across the Danube to 1st district, supermarket 2mins walk and restaurants, bars within close proximity.
Thoughtful hosts who left a gift basket for us.
Would highly recommend, however we found it a little small for 4, better suited to 2 people, but this depends on how much time you plan on being in the apartment whilst visiting Vienna.