I stayed at Sylvie's for almost a month and I really felt at home! We had a great time, Sylvie gave me a lot of good tips on where to go eat or what to see in Vienna. The apartment had everything I needed, it was clean and artistically decorated. The neighbourhood was nice and calm, quiet at night but very close to the metro station, from where you can easily get to the city centre. Oh, and the two cats were super lovely and cuddly. I really really recommend staying at Sylvie's for both long and short trips to Vienna!