the apartment is very nice BUT there is an issue with the apartment door that lets you leave the key inside and if by a mistake you didn't remove it you will be locked outside and the property owner will try to charge you for opening the door.
it is true there is a stamp on the door warning about that but trust me it can happen to you a mistake and they will scare you it can cost 200-300€.
I asked them how often does it happen, they said at least once a month - so instead of fixing the lock they charge you extra money! be aware and if they ask you to pay, insist not to!