I came to Vienna for a 10 days with my girlfriend and dog. we enjoyed the stay.
Andreas is super-friendly and positive host.
Flat is on the last floor with large terrace, 2 separate rooms and huge living room. car parking on the ground floor is included which is a cool bonus. air conditioning works very good and helps to survive super hot days in town.
Flat itself has plenty of stuff and basically everything you need for a normal life.
location is quite good with subway and tram station 1 minute walk. city center is 10-15 mins by public transport.
I liked there are few parks around where I spent time with dog and cool bay along Donau river.