We were very lucky! KI reserves some spots for all the erasmus students in a couple of residences and I got the best one (great location, rooms, facilities...). That's great, because many friends from other universities or from master's studies were struggling to get any housing.
The life in a student corridor was very enriching. We only lacked common places, but got to know a lot of people from many different countries!
I only have one complain: the fees, especially the deposit. I'm still waiting for a reply, I havent gotten it back yet and many friends didn't get it even if they left the room perfectly as they found it. There should be an inspection before we leave it, not an arbitrary one after!