The house was lovely and just as described. And Andrea was very easy to deal with. What's particularly nice is that house backs onto vineyards, so you feel like you're in the countryside rather than at the edge of the city.
It's about a 10-15 minute walk to the tram into the city (the terminus of line D). We'd recommend using Vienna's excellent public transport over driving into the city. (There's no ticket machine at the tram station though, so it's better to get tickets in advance -- you can buy both single tickets and multi-day visitor passes on your phone in the WienMobil app.)