We stayed here for a week., with 2 toddlers and a grandma, spacious place with all the necessities. The apartment is in a central location, close to everything one needs: restaurants, supermarkets, subway, shopping street, playgrounds for kids etc.
Felix is a very nice host, he waited for us and helped us with the luggage up to the third floor( no elevator).
For sure we’ll stay here again when in Vienna.