Nice clean apartment in a very good location close to the central train station. Beds were comfortable. One bedroom gets very bright as there are no blackout blinds. Also gets noisy at times. However, I'm a light sleeper.
There are three floor standing fans in the apartment as the weather was very warm while in Vienna.
Initial access to the apartment was a little bit confusing but a text/phone call to the host solved this. Would I stay there again? Probably.