The apartment is perfectly located and you basically can walk to all the famous landmarks or take the metro that is located around the corner. Karl provided all the necessary information and responded right away. Nevertheless we were not a 100% happy. The apartment was not as clean as other hosts have described it and there was a lot of broken/non functional stuff e.g. the bathroom door and the ventilation. And as we were 4 friends travelling together, it was quite inconvenient that we didn't have some privacy in the bathroom. Also we didn't expected to prepare the bed sofa by ourselves and the apartment is one of two apartments located in one flat, which we did not know beforehand. In general I wouldn't mind, but we did hear our neighbours every night leaving and arriving, partly because the door couldn't be closed quietly (doorknob was missing, so you had to bang it in order to close it) and because the walls are so thin that we could hear everything.
So all in all it was a great stay as for the location but unfortunately I cannot recommend it otherwise as from our experience.