This review was written by my daughter as in the end I caught covid and wasn’t able to go to Paris to join them.
This flat is really stylish and right in the heart of Montmartre next to a great little bar (Chez Camille). It's situated at the back of the building on the small street behind so was pretty quiet. In my opinion, it would be a bit of a squeeze for more than 2 adults as it's quite small, but it was fine for my daughters and I. It's worth being aware that the main area is open plan so you have to go through the living room to get to the kitchen area and bathroom. Also, there is a street lamp right outside the kitchen window with no shutters/curtains so it could be a bit difficult to sleep if you're on the sofa bed and like complete darkness. It was mostly well-equipped, but lacked a few little essentials like coffee-making facilities, a chopping/bread board and hooks for towels.