We were 3 friends staying at Carina's apartment.
It was globally a great airbnb experience, Carina is a great host, very thoughtful and easily reachable by phonetext.
The apartment is beautiful and perfectly cleaned. It's really close to the subway, 10minutes from the city center, 30min by feet.
The only thing negative was the sofa bed on our first night, which was not comfortable, but Carina was really reactive and provided us with an extra camping bed just the day after, and I slept perfectly.
You can choose this airbnb in Vienna with total confidence, you'll definitely have a wonderful time there!