We were a group of 7 people, we booked the big flat + the roof dependence for 3 days. Since the apartment is located on the top floor we were not disturbed by other people. Once you are in the big flat and have closed the door your are totally alone.
There are lot of stairs, without elevator, so I don't recommend to came with big suitcases.
The apartment is not brand new but honestly it's clean, well decorated, functional, and the terrasse is a must have.
We enjoyed our stay !