Laurence apartment is the perfect place to stay in Vienna. I stayed during one week with my parents. The location is amazing, in a very silent neighborhood, with lots of supermarkets nearby and just 5 minutes walk from the underground, which you can take to the city center (2 stops away). It is also 10 minutes walk from the central station, where you can take a 20 minutes train to the airport for a very cheap price (taxis in Viena are expensive). The flat was super clean and comfortable with everything you need for your stay, the decoration was very cozy with a lot of attention to details. Laurence also provides a lot of information about the city and a book where you can find restaurant recommendations as well as the must see of Vienna.
I would definitely choose to stay again in a future trip!