We were welcomed by Victoria, a friend of Caroline who was extremely sweet and helpful with the check-in. The area was as described, as in very centrally located. The flat was lovely and all amenities were present to make the stay very comfortable. Caroline checked in with us over email during the week if we needed anything and we thought it was very kind of her to do that. I would highly recommend her apartment to anyone wishing to stay in the heart of Vienna and prefers the homely feel of an apartment to a hotel. Whenever we return we will definitely stay at Caroline's apartment again. Maybe we will try her larger apartment the next time around.