Vincent's apartment is in a great location! Very close to the attractions of Old Town and not a far walk from the Castle. The room was very large and separated from the other two rooms rented out in the apartment. Your personal room can't be locked, but if you have concerns about security, there is a closet in the room you can lock your stuff in (we used a bike chain with a combination lock.) I briefly saw the other people in the apartment and just like you, they are vacationing or working and don't spend all day inside. The windows of the room are great although it can get a bit noisy at night, mostly foot traffic. We enjoyed our stay in the room.