Perfect location. The apartment themselves are located in a quiet and beautiful courtyard, but when you go out on the street, you are in the center of the city. Place was really great, well equipped but take in mind that main sleeping bed is located upstairs and there is not much space to move comfortably. About issue with the key to the main entrance, just don't put it inside to the max, put it inside about 2/3 and everything will be fine. :)