The apartment is excellent and well-equipped with everything that a solo business traveler needs. Very clean, comfortable, cosy and well-maintained. Superb value for money.
It's location was also ideal for my work at the VIC, which was only a short bus ride away. There is a supermarket right across the street and a few restaurants/cafes nearby. As a bonus, the Danube is also a few minutes away, perfect for relaxing walks in the summer.
Martin's apartment will definitely be the first one I check if I return to Vienna in the future.