It's a quite, clean, nice apartment, where you can feel save, there is even a security door at the entrance.
Although it is in the middle of the city, you don't hear people or cars very much, because it's on the 6th floor. Hana handed us the keys and gave us some tips for Prague, and a basket full of information including city maps with highlighted highlights were available. Since the apartment was not booked on the day of departure, we were even allowed to leave our luggage in the apartment until we got to the train!