We were 3 adults and a 1 year old. We stayed in the apartment for 5 nights.
The apartment is spacious and was very clean and tidy. 2 big bedrooms, decent sized beds, large open living and dining space and good sized bathroom. It was in a quiet street and if you have the windows shut, you don't hear any outside noise.
It is on the 2nd floor with no lift so this is something to be mindful of if you have lots of luggage, young kids, older travellers etc.
Location wise, there wasn't much to do in the immediate vicinity, but the positive was that it is just a 3 minute walk to Vienna Hauptbanhof (central station). It was very convenient to get on the underground/metro, tram and bus to get around Vienna and to and from the airport. In addition, if you are heading to the Wachau Valley, Bratislava, Budapest and around other parts of Austria etc., the trains all leave or pass through this station. For all the main sites in Vienna, they are a short ride on public transport or about a 20-50 minute walk depending on where you are going.
Linda was easy to reach before, during and after our stay. She let us drop our bags off and check in slightly earlier on our arrival date. On our departure date, she offered us a later check out.