Claire's apartment is cozy, but very small for 4 persons. However, it was clean and sufficient/nice for a short stay. There are two 1-person beds (very comfortable) in the bedroom, a bed-sofa and some tiny 70(?)cm foldable mattress. This one is for people who don't need any comfort. :-)
The style/architecture of the apartment are really interesting, if you like old-buildingst this is something for you!