This apartment is really nice but we had 3 sleepless nights due to the noise from the street (traffic, police sirens, singing, shouting) and that was with shutters, windows and curtains closed; plus the noise from the apartment next door (voices sound like they are in the same room as you), there is no sound-proofing between the main bedroom and the apartment next door. At 3am the first night we moved and tried sleeping in the living room on the sofa bed instead which is somewhat better as it faces the back rather than the side of the building, but we still had to sleep with pillows on top of our heads and the sofabed is not very comfortable.
Bedroom 2 is a loft with steep, narrow steps up to it so beware for younger children.
Be careful not to put salt in your coffee as i did! A glass jar next to the brown sugar has no label and looks like white sugar - its not, its salt.