Askin is very realiable and answered all of our questions. The location of the apartment is perfect and you can reach everything in the city center by walking. We generally really enjoyed our stay in Prague.
However, the apartment looks differently on the pictures and that disappointed us. It is not true that there is space for 4 people because the white big couch was missing. We were three guests and there was not place to sit and chat because we had just our beds. The chairs in the kitchen were also replaced by small stools which were not comfortable. Also there were no cushions and carpets which made the apartment look empty and not that cozy.
Overall we had a fine stay there and the apartment is a nice place, but I would strongly suggest to first make sure that the pictures were updated before booking.