My experience with ferry apartments was unpleasant and disastrous, the check in time we requested to be earlier but yet no one cares cause you only talk and speak to a robotic system, and they did not post check in or check out time so basically they lured us in only after the reservation was made we knew that the check in is late and had to stay 9 hours in the cold of Berlin until they allowed us to check in.
the code system is useless and unaffected.
second night, I went outside and came evn before midnight, and the outside door was closed, and no one answered it or opened i,
I had to stay almost 2 hours outside of the apartment which I have paid to stay in in 4 degrees cold and the numbers that they provided were not available despite that they say it is available 24/7.
and when eventually I called aAirb&b support,only then I had an answer ,andthey provided me a number that the person only spoke German,
the whole experience was frustrating and hard,
I do not recommend this place.