This is a quirky little property. It is sparkling clean, and the hosts communicate well. Space is limited for four adults, but works OK with cooperation. The bathrooms and toilet are down a narrow staircase which would be an issue for those with mobility issues. A slightly musty smell pervades given limited natural light and ventilation. An air conditioner is supplied.
If using the train, access is available from either the Barbes or Anders station on Line 4. My advice would be Anders.
All things considered a good option for this part of Paris.