For renting the appartment in the very centre of Praha at first you need to go to another place some 10 minutes by car to arrange all the formalities. There is the office of Praha City Appartments and there I didn't met Denisa but another person who politely explain how to find the appartment.
Reaching the appartment I was met by gentleman who showed the place and parking which is the shoping mall Kotva garage just around the corner.
Appartment is an old building in very centre just few minutes from Staromestky Namesty by foot. The premises are very nicely decorated with comfortable bed, spacios living room and well equiped kitchen on a first floor.
The price for the appartment was very OK as not in a season.
I would recomend the stay there for everyone who want to visit Praha.