We really liked our stay at Karl's place, flat is as described, main room is quite big so was completely enough for three of us. Bathroom is quite big as well. Everything was clean and nicely prepared. There is everything you need in the flat including coffee machine and capsules. We arrived quite late but Karl agreed to do a late check-in what was very appreciated. Location of the flat is amazing as well, only 5 minutes by walk to metro station, it is even possible to walk to the city center and already admire sights on the way. Neighbour is good as well, flat is situated in complex of multiple buildings, it is not next to the street so it is very quiet and we were not disturbed during the night.
Thank you for everything we will be happy to come back once we are in Vienna again!