Someone broke in. On our first night, a person entered the apartment using a key. We locked the door and left the key inside. Nonetheless, the door could be opened from the other side with the key. The perpetrator left once they heard us calling the police. Nothing was stolen but we were still in shock after the whole experience. Calling Pick A Flat they admitted to us that a previous guest had lost the keys (and codes) to the apartment once, but they had not bothered to replace the locks or change the codes. In our communication with Pick A Flat they told us contradicting messages about how we should proceed with the whole situation and apply for a refund. In the end, they were unwilling to give us a refund for the entire stay or even the rest of the remaining nights but only refunded the last two nights. According to Pick A Flat, the locks have since been changed for this apartment. Still, given our negative experience with the team and their borderline reckless negligence in not changing a lock, where the keys had been lost once, we can not recommend Pick A Flat and would strongly advise against staying with them.