First off, I would like to say that the accommodation was nice. The apartment looked great and modern. Unfortunately, overal we still had a very unpleasant experience. There was a break-in when we were out for dinner.
After we informed the landlord of the loss of several items belonging to us, the landlord reviewed the camera footage. There is a security camera focused on the front door of the flat. Phone contact with the flat's landlord revealed that a man wearing a cap entered our flat. The front door of our flat was secured with an electronic code lock. Given the ease with which the burglar opened our front door and the determination with which the burglar walked to the third floor, we consider it likely that the burglar had knowledge of this code. There was no break-in damage to the front door.
Despite the helpful attitude of the landlord, we are shocked that one could have gained access to the flat we rented in such an easy manner.