I was there around 1989 one night and morning . The floor was already creaking (I read in the reviews that it is still creaking). When someone was running in the next room, my bed was creaking too. My room was on the top floor, which was cheap and low quality. My bed was very hard, deepened towards the middle, I thought it had straw bags. I liked the dining room downstairs and i liked the breakfast.
We were poor back then in Hungary, but I never slept in such a bed.
I was about 16, on a class trip. My classmate said (of German origin, by the way) that we can go anywhere at night because Vienna is very safe. The trip was a pleasant experience.