We (3 friends) stayed in Vienna at Judit's place in Dec 2018 for 4 days and enjoyed our stay a lot. The apartment has a super great location- in a walking distance from main city attractions and very good connection to the whole city via public transport. It's in the old district close to Karlskirche and Belvedere, but the house is brand new, it's not a so called "Altbau", but a modern comfortable apartment, not very big, but spacious enough for 3-4 people and very cozy. There is a balcony- which is quite rare in central districts of Vienna. The building across the street was under construction but we did not hear any noise thanks to perfect sound isolation. The apartment is perfectly clean, having all necessary things and utensils, new furniture and good internet speed. Judit is a super nice host, very supportive and doing her best to make our stay comfortable: she provided in advance helpful info about the way from the airport, public transport, supermarkets, tourist tips and apps, etc. On arrival she was there personally, showed the apartment, answered all questions, and asked to contact her in case we need any help.
It's a perfect place to spend a short vacation, and a very nice host