It has been a pleasure to stay 4 nights in Ben & Yannik's apartment. The position is perfect to visit Vienna (near the underground, with three different bus stops in the neighborhood) and everything is at some minutes walk (market, gasthaus, pubs, McDonalds, parking, ...). The apartment is modern and clean, with a big bathroom and a complete furniture for kitchen. The guests provide all the information before reaching Vienna (you'll find the key in a safe) and are available (by phone message) during the stay. I recommend it.