We were there in April 2008,and we got room 6.
This is a room under the roof, at the streetside.
About 50 m opposite this room is a railway;during the night several goods trains pass there;the carriages make a terrible noise,also in that room;I don't know how it is in the other rooms.
I had big sleep problems,and I think that people like me, who are used to sleep in a quiet place, might run that risk too.