We had the best time. Felix was always available for questions or advice, but left us entirely to ourselves which was ideal. The apartment is brilliantly placed 10 minutes walk from the centre of Vienna, and even less to numerous cafes, bars and shops. The use of space in the flat was exceptional. It was extremely well equipped with everything you could need. It was clean, comfortable and warm and it incorporated many well kept plants to make it feel natural and homely. Strongly recommend.