We stayed in the flat for a week for a wedding in the area. Generally the pictures and reviews reflecting the quirky layout are accurate, though having two spaces for our party (kids/parents in the front and grandparents in the main) worked for us.
We loved the location with easy walks to super markets and boulangeries in the area. We especially loved The square de batignolles park with a playground and good proximity to good coffee (Dose cafe).
One thing thing I will note is that this is much more like staying at a friend of a friend’s house than an Airbnb or hotel. It has most of what you need but definitely is filled with the owner’s stuff. It’s your personal taste if this factors into your enjoyment of the stay.