I travelled to Vienna for essential business and Leyli & Vilém's place was an excellent choice for my stay.
The apartment is located very close to important transportation and shopping hubs, such as Vienna's main train station (Hauptbahnhof) and Rennweg.
It was quiet, clean and comfortable. Importantly, it had many useful amenities that worked perfectly. Check-in and checkout went smooth. I was impressed by the fast and thorough responses of the hosts to any questions.
In summary, I can fully recommend a stay at Leyli & Vilém's place.